So to add to fgdump/pwdump, Cain&Able, etc. I found some nice tools from Security Friday that are not generally easy to find on other boards.
ScoopLM
http://www.securityfriday.com/tools/ScoopLM.html
Theres several nice tools and articles here, so poke around a little. Take note for the article on "Hazard of 'My Network Places; on Windows XP". With a little imagination and virtualization you can create you own LM Honey pot to put on networks and grab hashes as users around you use "My Network Places"