We've decided to hold the next XMPP Summit in Portland, Oregon at the end of October. Mark your calendars for October 25th, which is the day after the Keeping it Realtime conference. Co-locating the XMPP Summit with krtconf makes a lot of sense, since both events are focused on building real-time applications.
Many details are yet to be worked out (e.g., we might hold a two-day Summit instead of a one-day Summit), but we will post again in a few weeks once we know more.
Please note that krtconf is a small, high-caliber conference and will sell out quickly, so make sure to get on their email list and register early before all their tickets are sold out (and think about giving a talk at krtconf, too!).