Wireless link solution?

[Kevin Brown]

I have a problem where I need to link my network together over, 
preferably, a wireless connection.  All the systems will be part of one 
slightly larger LAN within my home, but they are clustered in areas of 
the house that make running cable more painful than I consider 
worthwhile.  Also, I don't want to have to buy wireless NIC's for all my 
systems as I would take a local performance hit on the systems that are 
physically near each other doing that.

So, anyone have a recommendation on a small embedded device (linksys or 
otherwise) that allows the linking of two of them together for the 
purposes of acting as an invisible bridge?