Is LastFM about to announce a deal, possibly with US media giant Viacom? There was the odd whisper around the ’social music sharing’ startup at the Future of Web Apps conference this week in London – especially after their stellar presentation to developers and assorted VCs in the audience. Then we just heard this morning from a well-placed source that the deal was being hammered out today. has already reported that the purchase price will be $450 million dollars. However, hold your horses… I just got off the phone to LastFM co-founder Richard Jones, who said: “If you do a little digging there have been all sorts of rumours over the last few months none of which have turned out to be true. Our policy is not to comment on rumours.” And indeed he didn’t comment. But if this turns out to be true this would be possibly the biggest deal to come out of London for an Internet startup for several years. Stay tuned… literally….