I have not tried them yet, but have been keeping my eye on such lines as the QSC Rave, the Whirlwind ESnake and EMod systems, and the Aviom CAT-5 personal monitor network system.
Lately, I have been researching networkable DSP systems for a corporate conference /broadcast facility. (Symetrix's Symnet, BSS' Soundweb, etc.) Similar to a digital snake, but has DSP's distributed throughout the I/O interfaces. That gives you drag & drop network design and processing right at the inputs and outputs. By DSP, I mean mixing, routing, EQ, comp/limiting, etc.
The A/D D/A convertors are up to 96/48 or better and you can get mic pre's on the inputs (or use your own, but you can contol theirs on the network).
Seems very cool and if they work well, that's what I'm about!