thermometers?

[Joe Pfeiffer <pfeiffer@xxxxxxxxxxx>]

I'm looking to put thermometers in several rooms, reporting back to the
central controller.  So...  anybody know of any off-the-shelf solutions
that don't involve running new wires?  The closest thing I've found is
weather stations with PC interfaces and a remote sensor, which are (a)
expensive, and (b) give me only a single extra sensor.  Something I
could put in a junction box and power from the house 110 would be
great.

Ideal would be an INSTEON module, since I'm using that for everything
else.  Second choice would wi-fi, since that's the other network I've
got in the house.

At the moment, my best bet is looking like building something with an
XBee radio module, which just seems ridiculous.  Somebody must have done
this before!
--
As we enjoy great advantages from the inventions of others, we should
be glad of an opportunity to serve others by any invention of ours;
and this we should do freely and generously. (Benjamin Franklin)