I got an email from MeetingBurner this week promoting a contest during early August. Three winners will each get a year of MeetingBurner Premier, with unlimited use and webinar capacity of 1000 attendees.
If you want to enter, you can go to the following link and perform one of the registration activities. If you are willing to tweet about the contest, you can get an additional entry each day.
The contest ends on August 11. Good luck!