Some time ago I was going to try zsh, as Jordi told me it was better than bash, but I had just moved my systems to UTF-8 and I forgot about it. It seems that now it has uft support, so I've installed it and will try it on my development machine to see if I like it, my fist impressions are good, but I'm using it only since yesterday.
I also planned to learn how to use bazaar this summer, probably for package maintenance but I believe I'll try it on the future (maybe if I wait enough I'll be able to start directly from bazaar-ng, that looks a lot better) and keep using svn-buildpackage; I have a lot of pending things to do and no free time (I'm theoretically on my holidays, but an 8 months old kid and writing two chapters of a book eats all my time).