Some of my domain names were registered as a joke (haggisdiet.com was a bet against Andy Hagans), and it wouldn't be hard to register domains in the name of another person. Having said that, I doubt few people put my name on their domain names, and now you can look up a list of domains owned by a person by using Registrant Search. If you have thin affiliate sites that rank well in Google and are not using fake whois data then now might be a little late to start.
Via Domain Name News I recently discovered Sold Names, which aggregates publicly available price data for domain sales. You can also view last week's sales at DN Journal. If you find someone underselling a domain name browse through their inventory and see if they have any others worth buying.
In a world dominated by .coms an ad agency decided to promote a financial services company as being different by highlighting the .org in their name to show their non commercial / non-profit nature. 99 times out of 100 a .com is better than a .org, but if you can get a name that costs a million for the .com and only pay a few grand for the .org version and then add $998,000 of marketing to it I think the .org comes out on top.
Using a .org can also make your business look more trustworthy if you are offering a free service and/or are a quasi non-profit. A large part of the current price differential between .com, .net, and .org names is that those who are the biggest domain buyers do not have much development talent or intent to develop them. As a PPC lander page it is hard to earn much as a .net or .org.