Updated 7/6/10 at 8:45 PM
Starting with 2.75 inches of rain on June 30th, there have been 3.55 inches of rain in the past 6 days. This means good waterflow in all the creeks in Austin. There hasn't been any rain in the past few days, so bacteria levels shouldn't be as much of a concern as they are right after a downpour.
The water in Barton Creek couldn't be better for swimming and for finding a secluded swimming spot than right now.
Campell's Hole, Twin Falls, Sculptured Falls, Bull Creek... they're all good right now. And good news... there's a good chance of more rain over the next few days, and even a slight chance on Saturday.