Since I've learned about it, I've started using Subversion (svn) for everything. If you actually make corrections in any of the notes, I recommend doing it through svn. If you don't yet know how to use svn, I wrote a crash course just for you.
If you want to make corrections, but don't want to download the source or email me or learn svn, you can try going to this experimental wiki.
Daniel Murfet has a whole bunch of goodies on his page.
I gave a couple of talks on toric varieties in a student seminar. If my notes make sense to you, you're welcome to use them.
My notes (pdf, tgz), made from Tony's notes, of Yonathan's prelim workshop on analysis.
One of my favorite facts about right adjoint functors is that they commute with limits.
Sestina's and primes, an easy problem Richard and I worked out our first year, which I wrote up for some reason.
I talked about the Salamander Lemma in MCF. My reference was George Bergman's preprint, On diagram-chasing in double complexes.
Scripts
AirBearsLogin.py - A python script for logging into AirBears.unpnup - A modified version of Harald Hackenberg's unpnup bash script for converting two-page-per-page pdfs into one-page-per-page pdfs.
djvu2pdf - A bash script I use for converting djvu to pdf. (Why would I do that? Because the iLiad doesn't support djvu yet)