I'm seeing lots of bits of information about this, but nothing comprehensive: can anyone tell me -- if I already have an official "Notice of Relase of Federal Tax Lien," how do I make sure this gets removed from my CR (as per the new rules as of last year?). I want this thing OFF! 
As an FYI - it turns out that, if you have a lien and are on a Direct Debit Installment Agreement with them, the IRS will release that, too -- *before* you're done with the payments (certain conditions apply, of course).
I just can't express how anxious I am to see how this will affect/increase my score. These beasts have been killing my back, lol!
I'm pretty sure I have your answer!! And you don't have to do tons of faxing at all. Just fax one little form! I'm just sharing some good news on here because the IRS just removed my paid tax liens from all CRAs and they were just paid on Jan 15, 2012. There is NEW legislation that came out last February that few know about. You can read about it here:
http://www.irs.gov/newsroom/article/0,,id=236540,00.html
In short, liens will now be withdrawn once full payment of taxes is made if the taxpayer requests it. The IRS has determined that this approach is in the best interest of the government. and if you're in a payment plan you can have them removed as well.
I just faxed a form and 3 weeks later it was all done. That's quick for the IRS!!! You can get the form here:
http://www.irs.gov/businesses/small/article/0,,id=108339,00.html
It's the withdrawal form 12277.
Good luck everyone!! And make sure to share!
Starting Score: 635