TechBritain.com might eventually build in that facility. It ties in along the right lines of making the UK ecosystem more efficient at forming and supporting startups.
I see that's core (once it's done) as listing consultancies and startups, and clusters accross the country, and referring to external sites for specialised areas.
There'd be value in making a decent search & fuzzy matching of cofounder types, and helping people in embryonic stages of a project progress along the 'next step'.
