I got a Bubble Magus NAC 3 from BRS on a group buy for just over $100. I'm pretty happy with it. You can get an Octopus for just a bit more (can't remember the model).
"What, exactly, is the internet? Basically it is a global network exchanging digitized data in such a way that any computer, anywhere, that is equipped with a device called a 'modem', can make a noise like a duck choking on a kazoo." - Dave Barry