Second that, we had tons of problems with IE and sIFR on a fairly large site - and it is only good in SMALL amounts. We were doing the drop-down top navigation

Second that, we had tons of problems with IE and sIFR on a fairly large site - and it is only good in SMALL amounts. We were doing the drop-down top navigation, the side navigation, footer links and some more aux links and it was slow as hell - I wouldn't recommend it if you can get by without it.