Remember that DARPA balloon challenge, where the first team to find eight weather balloons wins $US40,000? Well, the balloons are now officially at large. If you don't have a team yet, here are some places to report a sighting.
What's cool is how most of the balloon hunting communities I've found are working towards selfless goals. Both DARPABalloon.com and this MIT group are proposing to gather a huge number of participants, and rather than give each contributor a measly cut, the forty grand will be donated to charity.
Good luck to everyone involved. If you happen to stumble across one this weekend, consider reporting it to a group that's playing for charity. $US40,000 can do a lot of good in the world. Just make sure it's not one some kid let go of first. [DARPA via WSJ via AllThingsD]