Considerations When Accepting Bandwidth Donations?

dnotj asks: "I'm involved in a project that is growing fast and is going to soon outgrow it's current hosting location. I've had a couple of offers for donating bandwidth (and servers in one case). Basically free colocation or dedicated servers. Since this isn't a revenue generating project, it's going to be necessary to migrate this project and it's related website to a location with adequate bandwidth. What kinds of questions should I be asking these generous organizations that make these offers? I just want to make sure I cover all my bases before jumping on one of these offers."