I use a hardwired solution using a modified Telewest remote control.
Basically I opened up the remote and removed one of the two LEDs and soldered in a jackplug socket. I made up a cable with a jackplug at the bedroom end ( i.e. the end without the STB) and an LED at the other end which comes through the wall at a suitable point in the living room where it can be pointed at the STB.
As the remote still has one LED it can still be used as a backup (i.e. when the living room remote has gone walkabout) just by unplugging from the cable.
---------- Post added at 20:27 ---------- Previous post was at 20:19 ----------
Forgot to mention I have a Pace 1010T STB and I bought the remote from Telewest (about £10) at the time I went digital four or five years ago ( I had a similar setup for the analogue box but was able to use a cheapo generic remote - such is progress! )
There is someone selling PACE 1000/2000 remotes on ebay for £2.99 + 2.99 p&p at the moment
http://cgi.ebay.co.uk/NTL-TELEWEST-D...QQcmdZViewItem