I'll second or third the idea of a good map. Also a good quality compass.

I question the 24 oz. bottle; I'd go for a Nalgene brand bottle if I needed to guarantee that my water wouldn't leak out while bounding down the trails.

AMK has come out with newer "heat sheet" and emergency "bivvy" bags that offer more strength. I'd consider one of those along with the poncho.

As far as the radio is concerned, FRS and GMRS radios are decent, but a "ham" (amateur) radio would be better. You would have access to repeaters in your area and reach quite a few folks. Granted that's more weight, but there are quite a few smaller sized handheld "ham" radios available. To use an amateur radio you would first need to get an FCC license by taking a test. See the link below for more information:

www.arrl.org

Of course, after we all get done chiming in and adding things to your pack, you aren't going to be running, you'll be walking. <img src="/images/graemlins/grin.gif" alt="" />