Or anybody have any other suggestions for a sub $80 device capable of wireless and LAMP?
A full-blown LAMP server for under $80 might be problematic (although the ~$50 Geode board mentioned in the other big Pi thread might do it), but this board
looks promising for running something like a thttpd-based web server. I haven't used one, yet: I got to the point of getting an order ready to go, but the client cancelled the project at the last minute. That system wouldn't've had a database, but it was going to run a full webserver with CGI, and be able to send SMS and email alerts via mailservers that required authentication with SSL. That company also offers a $110 board with 128M that's worth looking into.