Hrm, could be brilliant if it pans out, but I think the rewards management aspect is a little overstated. Most cards I've seen don't typically have rotating rewards categories, and even those are mostly per quarter rather than per month.
I am interested in seeing what override mechanisms they have, if it's easy, that might be a pretty simple way than storing my cards on a shelf and picking up a pair every given morning based on who I want transactions to run through for whatever reason (activity, rewards, or default every day). Most times I don't have unexpected purchases on a day to day basis, but if this service can cover that as well...
I'll certainly be following it with interest, assuming it processes over the Visa merchant network, it won't be an issue with it's being accepted at least.
