Could ReSharper integrate with VS2005 preview refactoring window? Although refactoring support in ReSharper 2.0 and VS2005 can't actually be compared, the preview refactoring window from VS2005 can be handy sometimes. There should be an option to disable it though, as it may be annoying for more advanced users.
Also, there are a lot of incomatibility issues between VS2005 final and ReSharper 2.0 build 209, which I am sure JetBrains is aware of (VS2005 final came after ReSharper 2.0 build 209). ReSharper 2.0 EAP builds for VS2003 are much more stable.