I'm really torn about freecycle here. When I first started out with it, I LOVED it probably because DH and I really needed the help - it was right when we first found out that we were having a baby, and we had no baby stuff, and nearly no money. Almost everything that we have for the baby with the exception of a few things from the shower or my mom's garage sale habit is from freecycle, and we're still hugely grateful.
On the other hand, I'm really offended by the way some people 'use' freecycle. We've been offering a lot of stuff lately as we've been cleaning out our basement, some of it pretty good -- an older computer that we didn't need, a printer, DH's old camera, etc. and people have been MEAN and PUSHY when replied to the offer and didn't get the item. I got a several nagging e-mails from one guy about how he should get the computer because he knew he was "First" and I wasn't being fair, in spite of the fact that there is no rule that you have to give an item to the first person who replies.
Many of the same people have been posting 'wanted' ads that are just disgusting; things like "Wanted: new ipod", or "Wanted: Everything for a baby, new or in perfect condition only, please!"
I'm not so worried about giving out our address, because we usually leave things for pick-up on the stoop or the porch with curtians closed, and I've never had a problem picking things up, but I'm usually getting baby/kid related stuff. But I really liked freecycle 'cause it wasn't about materialism and was about sharing and I think the shine has really worn off.