Re: Wi-fi Downloader
I got a Pentium 3 laptop on eBay a few years ago for >$180. After giving it a $30 WiFi PCMCIA card and Ubuntu Linux, it makes a great downloading/web browsing/IM chatting/file managing/photo viewing/movie watching laptop for cheap. Unless you plan on doing intensive stuff (gaming, video editing, photo editing, multi-tasking), all you'll ever really need is a light Pentium 3 or so laptop (up until a month or two ago when I got my new laptop, my Pentium 3 laptop was my primary computer even though I had two faster desktops, the convenience of the laptop outweighed the speed of the desktops).
A PDA with WiFi would work too, I have a Dell Axim X50v PDA with WiFi and a 16GB CF card, it would be OK for small downloads but big 1+ GB downloads would take a while on it's 802.11b 11mbps max connection. I'd suggest going to eBay and picking up an older Pentium 3 laptop, those are decent PC's especially for Ubuntu Linux and they're not too expensive.