I am delighted to see that this years FOSS.in will indeed take place. There were rumours about it not happening but fortunately you will have the opportunity to have a great time from 2010-12-15 to 2010-12-17!
You might have realised already, that his is only three days:
This year, the event is 3 days instead of the usual 5 days - a 5 day event was simply too exhausting for everyone (participants and team). Also, we have moved the event into the middle of December, to give students of colleges that usually have their exams end-November or early-December a chance to attend. Our American friends will be happy to note that we have moved the event safely out of Thanksgiving range
As last year, I expect the conference to be great. I do hope, that GNOME will be well represented, especially since GNOME-3 will be released and we have the potential to attract many new hackers. Also, because the KDE folks were staffed very well and we were not.