If you're attending the upcoming SLUG Keysigning Party, you will want to click here to submit your details so we can make this go smoothly. The list of current RSVPs is here. You can also read the original announce to SLUG. Also, if you're concerned about who's in control of the private key, go here to check.
Here are some URLs about GPG and key signing that you will find useful:
As more SLUG keysignings occur, the keyring will grow. You can download it from here. Save it to ~/.gnupg/slug-keyring.gpg and put the line keyring slug-keyring.gpg into ~/.gnupg/options.
Graphs are cool, so I've also built some images of the current SLUG web of trust in slug-keyring.jpg. People who have not been signed or made a signing on someone else will not show up in the graph. For older images, check out the entire directory. The yellower people are the "sinks", they have been signed a lot but not signed others, the blues are the generous people who do a lot of signing but aren't signed in return. The greens are roughly equal signee and signer.
To build your own images of your keyrings, look how I did it. This shell script requires sig2dot.pl, imagemagick, and neato, which can be installed from the graphviz package in Debian.
Have a look at Graphing the Debian Keyring Web of Trust for more.
There are some things you might want to automate for gpg, such as periodic key updates. I've written a few shell scripts that you can use.