What's it called? ddWRT, maybe? Been a while since I did this. It's new firmware for Linksys routers that lets you use them as a bridge device. IE, plug your Amiga into router, router connects wirelessly to your "main" wireless router, and, like magic, your Amiga has "wireless". And on the software side, it's just like configuring a wired connection. The router takes care of all the encryption.
And I should add that this is cheaper than buying a dedicated bridge and hanging a hub/switch off of it.