Some Microsoft employees convinced me to install IE7.
It has some nice new features like tabbed browsing, anti-phishing, popup blocker, ...
I have been using Maxthon for a long time, it is a shell around IE and contains a lot of nice features too. I might no longer need it now IE7 supports a lot of the features I got used too. There is one feature missing though (can be downloaded but doesn't come out of the box as far as I see) and that is the "Mouse Gestures" feature.
IE7 will be offered by Windows Update too and should be released the 1st of November.
Anyway, most of the sites I tend to visit seem to work quite well and last but not least I am able to post to my blog using IE7 too.