1) Is there community interest in these features becoming available?
2) Does anyone have any suggestions for other AI plugins they would like?
3) Can Jorrit or anyone else involved please explain why the GSoC 2007 AI project never made it into the CEL source?
Quite a bit late to answer, but well, for the records...
I won't answer 1 & 2 since
you've been selected for GSoC 2009 AI project 
For interested people, also check the
CEL mailing list archives.
For 3, well, the
GSoC 2007 was merged in CEL trunk.
If you meant GSoC 2008, there simply was about
nothing to merge, the guy disappeared and the project failed
