I've only had a quick prod at this, but it's interesting enough to post - and there's a reason why posting sooner rather than later, as there's a sorta-time-limit here. Radio 7 have done a two part radio drama, about a pair of siblings discovering that their inheritance is harder to get than you may expect. However, it's complimented by an audio-lead web-adventure . The game concentrates on one brother's perspective. The radio play concentrates on the other. By experiencing them all, you'll get more of the picture. The game's produced by DESQ, and is graphically simple and based around simple adventure-style interaction (Finding items, examining stuff, combining, etc), but with pretty neat audio. While the game's online indefinitely, the radio play is only on the iPlayer service - which means the first part isn't there any more and the second one only has another five days on its clock. So get a move on, eh? Fascinating to see the BBC trying something that's as determinedly cross-media as this. Go play here or listen here.
EDIT: However, the play will be broadcast again on the 17th and 24th of September, meaning that it'll be back on Iplayer for a week then.