Good call, these are great lectures. I've watched the first 5 or 6 lectures a couple of years ago when MIT first put up the OpenCourseWare site, but because I can't apply a lot of the concepts to my "real job code", and because I started to get lost (I couldn't get a decent interpreter installed to actually try this stuff out), I never finished. Now I get to try to put it into practice. F# looks simply perfect for this. C# perhaps, but that remains to be seen.
Seriously, I've contemplated going through every sample in the Structure and Interpretation of Computer Programs in turn and try to make C# and F# versions. Perhaps I'll be ambitious enough to try if I can ever I get this Orcas May CTP VPC image decompressed (6GB!).