For a range of RF links products, have a look at:

RF Monolithics, Inc.
Dallas, TX  USA
(972) 233-2903

Europe:
18 allee Marin la Messlee
78560 Port Marly, France
Tel: (33) 0 1 39.16.42.89
Fax:       --         .70

Their product line includes transmitter and receiver modules,
transceiver boards, surface mount RF hybrids, and the Virtual Wire
Development Kit: 2 RF transceivers, development boards, link layer
packet protocol software, antennas.  Available for 433.92MHz (Euro) and
916.5MHz (USA).

I have no connection with the company, but thought many PICers would be
interested.
--

Paul Mathews, consulting engineer
AEngineering Co.
optoeng@whidbey.com
non-contact sensing and optoelectronics specialists