Why not come work on the Common Language Runtime team at Microsoft?  My team is a team of SDETs (Software Development Engineer in Test) that works in the really low levels of the CLR.  We cover areas like assembly loading/fusion, AppDomains, the shim (mscoree), and interop.

As an SDET, you are in charge of all aspects of quality for the areas you own. This means you get to be involved in the design process and be literally the first person developing code using new features coming out of the team.  I've found my last year and a half here to be extremely satisfying.

This is a pretty exciting time to join the team as we're working on some long-lead items for the next version of the CLR and we're also busy shipping Silverlight 2 and .NET Framework 3.5 SP1.

You'll need strong coding, problem-solving, and communication skills.  Some background on the CLR and managed code is a plus, but not required.  If you think you've got what it takes to join the team, check out the job details and submit your resume.  I'm happy to answer questions about the team and the jobs within reason, so feel free to ping me at marklio at [you-know-where].com.

There are several openings in other areas of the team as well.  Feel free to search the other CLR jobs and find the one that's right for you.