Since I was interested in this area of specialization, my, no old employer, allowed me to assist on a large scale vulnerability assessment performing the recon and a few network scans and then later was given a smaller external assessment to perform. Since then I've sifted through different security news sites, picked up a few books to learn how to use some tools better, like NMAP and Nessus. Also have kept an updated copy of Backtrack.
I just like the fact that it is like a game, a puzzle of sorts! I am a sucker for a good puzzle. But I digress, thanks for keeping this site up and running and providing the useful information, it is a huge help!