XDelusion:
Please please do not listen to some of these people. I myself use a PCMCIA ethernet card with cnet.device and it works excellent and fast....and they are cheap to and very available. If it seems slow...it only because your Amiga is slow, so the webpages will come up slower than usual because maybe your running a 68030 like me. but if you have an 040 or 060 it should be faster.
My card is a PCMCIA 10Mbps, it also says its a 16bit card with 5v power.
Chatting on IRC and AOL Instant Messenger (AmigAIM) runs beautifully. and downloading from Aminet is quick and simple. Don't expect to surf webpages as fast as a PC though, because in this respect Amigas are slower and have sucky web Browsers.