I just discovered UK-based Brown Book, which is pursuing a Wiki-like approach to building a directory (with reviews). Yellowikis was the first in this category, though both Yahoo! and Google allow users to edit listings as well.
There are a range of “Web 2.0″ directories in the UK, including TouchLocal and TrustedPlaces, among a few others. I would expect UK yellow pages publisher Yell to move more in this direction or to acquire one of these companies eventually.

January 7, 2008 at 11:52 am
[...] UGC local site in the UK from [...]
January 7, 2008 at 12:11 pm
Hi Greg, thanks for the reference. Did you also notice that in Brownbook anyone can ADD any business. Its totally open, in the spirit of wikis.
J
http://www.brownbook.net
August 27, 2008 at 3:39 pm
[...] my short original post on the [...]
September 10, 2008 at 7:52 am
[...] Press Coverage Aug 28, 2008 - Greg Sterling - Brownbook the tortoise in directories race? Aug 28, 2008 - InfoCommerce Group Inc. - Brownbook launches mobile platform Aug 27, 2008 - Greg Sterling - Brownbook Launches in US Market Aug 13, 2008 - Telegraph - Blog on and use web pages to drive up sales opportunities Aug 7, 2008 - VS Consulting Group - Brownbook The Free Business Directory That Anyone Can Instantly Edit Jul 31, 2008 - Kelsey Group - Brownbook Following Different Path To IYP Success Jul 31, 2008 - Intruders TV Interview Jul 30, 2008 - Commercial Phone Book’s Business Model Threatened Jul 23, 2008 - 27 million businesses and growing Mar 28, 2008 - BBC Click - Evolution of the Social Network (article and VIDEO) Mar 26, 2008 - Brown is the new yellow Mar 25, 2008 - Web Directory Exposes Rogue Firms Mar 10, 2008 - Wear Valley Mercury - Website helps find businesses - with good feedback Mar 05, 2008 - Doncaster Today - New website to find the service that you need Feb 21, 2008 - Uncover The Internet - “Doh! Why didn’t I think of that” Feb 20, 2008 - Web User Feb 2008 - Brownbook.net rated 4 Stars Feb 18, 2008 - PCM Inernational - Are We Shifting from YellowPages to BrownPages? Feb 13, 2008 - Killer Startups - brownbook.net, the open yellow pages Feb 08, 2008 - Info Commerce - Is Brown the New Yellow? Feb 06, 2008 - Kelsey Group - U.K.’s Brownbook a Good Web 2.0 Example for IYPs Feb 06, 2008 - Computer Business Review - Local business directory website The Brownbook launched in UK Feb 05, 2008 - Computer World UK - I’ve just got a little (Brown)book Feb 04, 2008 - BCS.org - Brownbook launches Feb 04, 2008 - ITPro - Brownbook offers businesses the opportunity to promote by reputation rather than by spending money Feb 04, 2008 - Yahoo News - launch PR Feb 04, 2008 - PaidContent.org - launch PR Feb 04, 2008 - FOXBusiness - launch PR Feb 04, 2008 - Investors.com Feb 04, 2008 - Sys-Con Media - launch PR Jan 04, 2008 - Greg Sterling [...]