Another one from me... sorry ...but I hope it's helpful.
@UK - http://www.atuk.co.uk - has being going since the year dot in internet terms (ie. since 1993). It's changed quite a bit in that time but, by virtue of being around from the early days, it's traffic is healthy (around 70,000 uniques a month currently).
Anyone with a rental property in the UK with its own website may requrest a link free of charge - just go to http://www.atuk.co.uk/addurl
You don't have to reciprocate but of course that's always welcome.
Aaron