At the gathering this past weekend, I consumed a liter of water treated with Aquamira ClO2 drops. I have not succumbed to Giardia or Cryptosporidium or anything else after 4 days. I know Jesse has been known to drink that water straight, but he also doesn't wear shoes.

I picked this stuff up for a couple of reasons. One is that it only takes about 1/2 hour to treat the water versus 4 hours for ClO2 tablets. Unlike boiling (still my preferred method), you can treat your water on the go if need be. Unlike filters, straight chlorine and iodine, ClO2 gets rid of protozoans, bacteria AND viruses. Also, and this hasn't happened to me, I understand that the tablets can degrade to powder in your kit which isn't an issue with the drops. Additionally, the river water was a bit smelly, but the drops significantly improved the taste. Jesse could still taste it, but remarked that it was not nearly as bad as it would be straight up. I don't think it's anything a little Gatorade can't fix.
Here is a link if you are interested.
http://www.amazon.com/Aquamira-Water-Tr ... mira+water
I also developed a technique for collecting water in an empty Gatorade bottle that I normally use for, ahem, other purposes. Faced with a steep bank and not really wanting to get wet, I tied a piece of cord to the neck of the bottle and tossed it in. It would fill about halfway and then just bob there. I found that by sticking the tip of my hiking staff into the bottle, I could completely submerge the mouth of the bottle and get the air out.
For what it's worth,
Rob