ReSharper 4 Early Access Program will start within next two weeks, before Feb 15.
The delay is caused mostly by the complexity of lambda implementation, which we really want to do right so that the power of C# 3.0 and ReSharper can be utilized at a full rate. Now, when we have lambdas working, we will finish with LINQ processing, polish the code a bit and start nightly builds.
I'm going to post some feature highlights here during that period. This will cover C# 3.0 new features support, new features like Complete Statement and Recent Edits, improvements in intellisense like CamelHumps completion and other.