I tried Resharper a few months ago - and to be honest it was interesting but none too stable. In short, the tool didn't meet my 'more trouble than it's worth' test. Anyway, I just downloaded the latest version (0.84) - it's now pretty awesome, used it in a coding session today and it does make things a lot easier, the 'namespace' insertion stuff is awesome - so you no longer have to remember namespaces - for example, just type StringCollection and a little popup appears with the right namespace and it sticks in a 'using' statement in your class.
So, long story short this is one of only two tools I allow near my Visual Studio .NET - the other being QuickCode (I can generate a Strongly Typed Collection class by just typing 'collection NewsItem' + Alt-Q - which is pretty useful!).
Oh, to get the Resharper download, use eapuser, eapuser as uname / pwd.
UPDATE (09/06/2004): Just noticed that Scott Densmore metions that a new version - 0.85 was released today - also reading the Resharper site it mentions that the final version is due for release in just 11 short days (20th June 2004 for the numerically impaired)...so that's good then! (Oh, Jetbrains - if you want someone to review the final version I volunteer :-))