You can grab my RSA PGP 2.6 key here or my DSA PGP 5.x/GPG key here. I'm linked into the largest PGP strongly connected key set, which according to stats I ran some time ago (2000) consists of at least 9329 keys.
There are more recent stats on the strong keyring at http://keyserver.kjsl.com/~jharris/ka/
I've written an OpenPGP keyserver, onak, which isn't quite feature complete yet, but can do funky things like find the path between 2 keys. You can try this out on my pathfinder page. One thing I'd like to look at is getting it to generate signer/signee graphs for people's keys that could then go on t-shirts or similar. And to try and hook up the keyanalyze code to be able to talk directly to the key db for some realtime stats, though this might chug far too much cpu for most things.
I'm more than happy to sign PGP/GPG keys given proper photo ID and fingerprint verification - I'm resident in Norwich, England, UK and Newry, Northern Ireland, UK at various points of the year, so feel free to give me an email.