MDK. I have had to make two releases in a row. In the first one (0.3.3) went all the new functionality (output device formatting, compile and edit commands, command history and bug fixes) together with a serious bug which made gmixv to segfault on startup! So i had to rush a new version fixing it (the current one, 0.3.4), causing havoc to a lot of people (specially, the packages maintainers, which have had double work; fortunately, they are very nice guys :-).

Hacking. Learned a little vim, but i'm still hooked on emacs for actual development. Nevertheless, vim is a nice editor, and comes in very handy for editing config files and scripts.

FP. More SICP, and a little Ocaml (i bought Coisenau and Mauny's book). The latter looks very interesting, and i read some benchmarks that rate it very high.