On September 7, 2010, just for fun, we’ll be changing our logo each day as a salute to some of the best and most interesting startups that we cover regularly here on TechCrunch (plus a few surprises thrown in!). We’ll do this for 50 days, a new logo each day. We’ll add each new logo below as they go up on TechCrunch, and let you know who it is just in case you can’t figure it out. Thanks to Audrey