I haven't used USB to ADSL on my A2000 (nor the webserver A2000 for AmigaU) because I have ethernet cards, and in most cases, I don't know why you'd use USB instead of ethernet, ethernet is faster and in nearly every case, you'd be hard pressed to use even the 10Mbps on a base Amiga ethernet card, let alone 100mbps, because most DSL connections aren't even *1*mbps anyway. More than enough bandwidth for your needs, to be sure.
Yes, I've seen buddies with cable modems that can download faster than I can on DSL, but so what? If you need to run servers, then you can't, plain and simple (unless you want to be changing port#'s and have them shut you down and possibly kick you out if they catch you - yes, the cable companies aren't hacker central and probably won't, but most cable networks only work fast in one direction anyway, for downloading.
If you need USB *and* Ethernet on the same machine, just get a HIGHWAY card with its NORWAY ethernet module, and get the best of both worlds. Then you can get a cheap USB card reader and mess around with digital pics, etc. too in addition to surfing the internet with your ethernet. The X-surf is also a great ethernet card (or a used Ariadne II if you can find one on eBay or similar) but it doesn't have USB, so if you wanted a card reader it would likely have to be IDE.
Good luck, have fun! Note that if you are serious about surfing the internet on your A2000, a graphics card like a CGX64/3D using Picasso96 or CGX4 is probably a must, too, since surfing the internet in 16 colors and having little to no Chip RAM (most A2000's only have 1MB, after all) will shorten your Internet stay very quickly unless you are only retrieving email or newsgroups, IRC.. .
kevin orme
amiga university
www.amigau.com