You won't find a coherent account in the main stream media, but since most folks don't know where Tbilisi is and never heard of S. Ossetia, you might take a look at this fairly comprehensive description of the events of the last couple of days:
Insight on the Situation
Be advised, however, that reading one perspective on a complex international situation is not decisive and only qualifies you to pursue further knowledge.
By the way, I know where Tbilisi is. I once slept with a nuclear weapon addressed to Tbilisi which I was to deliver on short notice if the President asked me. 345KT of instant sunshine--more than 15 times the size of the Nagasaki bomb. I know exactly where Tbilisi is.