In an earlier post I mentioned I didn't know how to search-n-replace in multiple files using Emacs.
It turns out there is no good way to do that out-of-the-box. But after an intense Google session I found this entry in the Emacs Wiki: GlobRep.
There are other options as well, mentioned on the SearchAndReplace page, but that page seems a bit chaotic, and I'm quite happy with GlobRep.
The other day I also discovered (well, discovered... I needed the functionality and looked for it) ediff, and especially ediff-directories. Very, very powerful diff and merge functionality, usable in a vague kind of way. In some way it's even better than Araxis Merge which is an accomplishment.
Ediff is one of the best reasons for staying in Emacs. I've been using Eclipse a lot recently and it's very, very good overall. But the diff utility just plain sucks after using ediff.
For more info, look at the EdiffMode page on the emacs wiki. There's good tips there.
-Dom
