I've been playing for a while, and I'm converted. Flickr is wonderful, one can join 'groups' of similar interest, label features within photos and keep photos private of for friends only.
I'm even going to see about getting my phone talking to email especially (and this will allow LJ posting too).
I'm seriously thinking about getting the full paid account to remove the upload limit (which I've already reached), but will leave it a bit just to see how things go. I don't even know if any of my contacts use Flickr - and that is something which really adds to the thing.