for ethernet access use Xport from Lantronix or Digi modul from digi. They are relatively cheap and works well. or software, protocols, driver... search open source software doing this. i saw project with in-chip programed console interface with menus, like dos navigator or dos edit. it was connected via serial line to PC. Xport and similar acts as pipe between serial line and opened tcp socket. so if you are using hyperterminal, you only select tcp/ip instead of com1. or you can make simple web page in xport and firmware. firmware must have some protocol for communication with pic. or make it with TV out (there is some project with pic, connected to TV and gui, or project of TV terminal) and RC5 decoder. then you could be controlling entire house from your sofa.
PS: then post that project