I don't use mine very often, but it's handy for snapping anything daft I happen to spot, sending email postcards while on holiday, and stuff like shopping for gifts - I can wander from shop to shop taking pics of potential purchases, then when I'm fed up with trudging round sit down and look through them to choose. It's a quick way of making visual notes.
Video and audio recording is less useful due to the use of non-standard formats, making sending the files to anything other than another similar phone pretty pointless. Very annoying.