Nothing major... just a bunch of small things and clean-ups that aren't visible. (A lot of things that will make it easier for sites like deadjournal.com to run)
I'm posting here because there's a good chance I broke something. If you notice anything that's not working (besides the directory and interest matching), then let me know here.
If all goes well, I'll get to work on noticable fun stuff, but this past week of clean-up was definitely needed. I suppose it might not make much sense if you don't program, but you can't just add fun features all the time ... you have to pause every so often and document, clean, audit, rearrange, etc.