We thought we had a good lead on the #10 balloon but one of the geocachers on the ground was unable to confirm it. However, we were able to confirm #1 and are closing down on #5. Great work geocachers!
Groundspeak is a 9 year old company that owns and operates Geocaching.com. Geocaching is a high-tech treasure hunting game played throughout the world by adventure seekers equipped with GPS devices. The basic idea is to locate hidden containers, called geocaches, outdoors and then share your experiences online.