[jfruh]

Traditionally when I've freelanced in the past I've billed hourly (varying rates, depending on what the client will bear) but I've read some convincing stuff that billing that way in essence punishes productivity. If you figure out how to do things faster, you just end up costing yourself money, so why bother? I've done agreed per-project rates as well and I think they're both more lucrative and better for your sanity.