Freecycle is a great thing (although, if you live in a large area- you can get a few too many emails). I use them and my SIL does too. She got some free exercise equipment.
I have blogged about it on my site before- it's a pretty cool idea.
Anther great source for this kind of thing (but baby and kid related) is http://freepeats.org/ . Until the 20th they are doing free membership.