In addition to Yahoo! mail, I would like to add to the list that Wells Fargo online access is also not supported for IE7; and I get the following error.

For Online Access with Wells Fargo You Must Use a Supported Browser

Wells Fargo no longer supports the browser version you are using. Please upgrade to a supported browser in order to get access to Wells Fargo’s secure sites

Its bit surprice that the web developers are having a upper check on Versions; means if one releases something with major version change lets say from 6 to 7 in case of IE even without any functional change, the web site will not work. hhhh…
[Submitted by Kelly Moore]