Sometimes ago, I asked people tips to photographing subjects in the rain. Damn, this is DAMN DAMN BUT REALLY DAMN hard. first or you're really lucky for being reaaaally rainy, or otherwise you cannot get a good picture!
So these were my results (in fact only 2 of them show the rain, and they are crap per say!), but well, the time makes me practice, and practice will make get better results soon.
The forum about it is here: Photographing Subjects In The Rain
if anyone has more tips please telling me :)