Bank of America. Sure they are huge, evil and have horrible telephone service, but their web interface/bill pay is pretty decent.
BoA sucks so bad that LaSalle Bank was awesome in comparison. if there were one US bank i could make collapse it would be BoA: it has awful customer service, crappy online interface and is run like a giant turd.
nothing quite like waiting 45 minutes to make a fucking wire transfer at a branch. employees turn over at their chicago branches more often than any other bank i've ever been to.