HTC's throwing itself a little party starting at 11:30AM local time in London on Wednesday, June 24, though it's not saying what sorts of goodies will be unveiled there. As you might recall, the Touch Diamond was unveiled at a similar event just over a year ago, so it's very likely an important product that's going to be shown; the odds-on favorite would have to be the HTC Hero and its customized Android-based interface, but at this point, it's anybody's guess.
Update: Here's an interesting clue -- that's a rose on the dude's chest, as in the Rosie interface. Get it, eh? Eh?