Chris Samarin just launched SwitchPlanet.com as a private beta and would love to get some feedback on the site. He is also able to sign up some private beta testers (csamarin(at)gmail.com.)

Chris explains:

Basic concept...recycle the things you have and no longer need to get the stuff you want all for free(no sign up fees, no transaction fees, no monthly fees, etc.). Because it's free we give members the option to make a donation that goes into our SwitchFund that gets distributed among charities and non-profits.  Members can also create profiles and socialize and all that great stuff.

I'm a one man shop, with a dev team, but no funding or marketing "guru" to help get the word out. 

A quick look into the future…I'm looking to add SMS member verification (similar to how Gmail works when you sign up) before we come out of private beta and then start rolling out new features like friends and groups as well as branch out into the UK and into other switch-able items like books, tools or whatever else the members ask for during the open beta period.