In order to keep up some sort of web of trust (in the PGP sense, not in the Thawte sense), and to distribute host keys for publicly accessible systems I manage, I sign a variety of keys from time to time.
Here are a selection of people's keys I've signed. Some of the signatures and keys are really old, however. If you see your key here that you wish to update, please do arrange to meet up again sometime!
The keys are now stored in a keyserver, to make updating easier. The old links to individual .pgp files still work, and will redirect to the appropriate HKP request. Consequently, to access the keys, you will need to be able to connect to port 11371.
Among other things, I host web sites and domains for friends. Currently, the only means of uploading these things is via the use of SSH. So, I publish SSH keys of publicly-accessible machines I run, so people can update their known_hosts file as they wish.
You may wish to read about what my various keys do and how to verify them.