Dear,

After a suggestion from quicksilver, I decided to write this message. To get lambdabot working on 6.6.1 you need to:
1) ensure you have the regexp-base, regexp-compat and regexp-posix from hackage installed
2) If you install them from user, make sure to add --user in the build-script of lambdabot
3) Get hs-plugins from darcs http://www.cse.unsw.edu.au/~dons/code/hs-plugins/ , not from hackage (Lemmih informed it's an issue with the .hi parser)
4) Fix Lib/Parser.hs and replace "> 606" with ">= 606" in the #if GLASSGOW_HASKELL around the definition of "pling_name" and co
5) Remove the Maybe-definition of arbitrary in scripts/ShowQ.hs
6) Make sure to uncomment the runplugs section in lambdabot.cabal
7) ...
8) Profit

Cheers