If you're in or around the Midlands of South Carolina area, the Columbia Enterprise Developers Guild meets the 2nd Wednesday of every month. That would be tonight, July 11th.
Tonight's topic will be Windows Phone 7: Tips & Tricks Every Developer Should Know. The speaker is Chris Craft (blog | twitter), a former Windows mobile MVP. He's a great guy and a great speaker. If you can make it, you're sure to learn something, even if you don't normally work with Windows Phone.