edit to add: as of 06/01/2011, the PRPS membership only works if you're a resident of Pennsylvania. 
Another organization has popped up that might work. You can skip to screen 43 (or later) to learn about this latest twist.
edited 6/10/2011
OK, now that one's a dud. Looks like this CU will wind up being pretty much restricted to Pennsylvania residents in most cases. Skip to this post.
Edited again 6/14/2011
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PSECU has added a new qualifying organization. And I think it must be in response to all those who want to join to access their EX score, because it's a separate category on their site.
Go to www.psecu.org, click Join PSECU, click again on join PSECU (this time it's an option on a page), and click "Launch Application."
Enter your social and DOB.
I can't go farther, since I've already joined, but there is now a separate category called something like "Friend of Pennsylvania Recreation and Park Society or interested in joining." Click that, and sign up. It costs $20, and it says that your membership won't start until 1/1/2011, but it seems to be enough to do the job for PSECU membership. I think I clicked that I was interested in trails or something, but my category is "friend." I entered my out-of-state home and work addresses.
Then go back to the PSECU site and do the same as above, and this time enter that you're a member of PRPS. Sign up for share (you have to do this; it's how credit unions work) and checking <--you need checking or a credit product to see your score! I also signed up for online account access. You have to authorize a $6 pull from your bank ($5 for the share/ savings account and $1 for checking) There's a hard inq (don't know which, and I don't care), and you wait, and boom, you're in.
Oh, and when it asks if you want to print out your app or have them mail it to you, write down your new membership number first, because you won't be able to get back to it. 
I'll have to call in the morning.
It took for-absolutely-ever for me to go through the whole process, because I'm away from home and using a hotel internet access, but I suspect also that they're already bogged down from those who've discovered this.
Just a general plea to all: after all the posts I've read over the last three (wow, three, really??) years about joining frenzies for Justice FCU and CCCU and PenFed and Alliant and all the others: things will bog down. It will take time. Be patient. Be kind to the CSR's who probably don't know what's about to hit them. Don't call and pester and beg about CC's and auto loans and whatever. Let them process all the apps through and get to you when they can. They're just chumps like you and I, making $10.50 an hour or whatever, and they don't need a bunch of hysterical phone calls. Give it time!
As long as we can FINALLY!!! see our EX FICO's again, I can certainly wait for any additional goodies. 
Thumbs up to both PSECU and to Pennsylvania Recreation and Parks, who now has a handy income stream to keep their no-doubt-wonderful state park system going. Hey, California tried to legalize pot, just so they could tax it and keep the budget afloat, so it's not the oddest source of funding ever known.
And many thanks to my pm buddy who clued me in on this! 
edited to fix name of qualifying org, which is Recreation and Park, not Park and Recreation.
edited again to clarify the importance of signing up for checking (or applying for credit, which didn't come up on my application process) to see your EX FICO score. Thanks to gbishere for pointing this out!
Thanks for the info HTSU but I'm not sure if I want to spend $26 to find out what my EX score is. It was just fine a year ago and I don't believe it's gotten any worse.
But I'm a cheapskate.
From a BK years ago to:
EX - 9/09 pulled by lender 802, EQ - 10/10-813, TU - 10/10-774
"Some people spend an entire lifetime wondering if they've made a difference. The Marines don't have that problem".
@MarineVietVet wrote:
@stan_the_man wrote:
You get your EX score every month. This might be the cheapest credit score monitoring service that you'll ever signup for.
Oh I understand what you're saying and it really is a good deal but I'm just not interested. My TU and EQ scores are high enough and I'm confident my EX score has not declined in the last year. As long as I continue to do the right things my scores will do just fine and I will only check them perhaps twice a year or so.
I hear ya on this! But you weren't around (at least, I don't think) in the old days, when we could see all our FICO scores, and we pulled TrueCredit daily to update our reports, and an astonishing number of members whined and groused about having to wait 24 hours + 1 minute to refresh their reports so they had a second monitoring service so they could pull all three twice every day, and we posted and argued and obsessed about every change on every report and in every score for the slightest update. 
All I can say is, I'm sure that we were pariahs in any neighborhood cocktail parties.
I thought I was over all this, but like an old fire department horse, once I smelled smoke, I started kicking the walls of my stall.
By golly, I have an EX FICO score, and I want to see it!