When I run from work, all I carry is my key fob thingy for my car. It fits nicely in the pocket on the back of my running capris. I've left it hidden under my car once or twice when I had NO pockets as well. I wear a road ID and I don't bother with my cell.

If I'm running for an hour or more, I carry a water belt and that has a small pocket in which I could put other stuff.

When I run from home, I also file a flight plan with my H including route, timing and such. Running in the country scares me, so I'm extra careful. I still don't bother with my cell though - since it only works half the time out there anyway.

I did get something like this for christmas intended for my ipod (mine is all neoprene and it is a bit smaller) - but since I don't listen to music when I run, I haven't used it. It would be good for keys/cell though... Maybe I should break it out and put it to use.