TCC Online: April 16-18 The theme this year is "Emerging Technologies for Learning: Best Choices & Current Practices"
Connecting Online for Instruction and Learning Conference: Feb 1-3, 2013 and it is FREE.
JISC Innovative E-Learning: The 2013 conference information is not available yet, but this is one to keep an eye on, and past conference notes are here.
Jossey-Bass has an annual conference, and allows access to the archived content.
Educause has a good listing of online events and Webinars. The catch is your institution needs to be a member for you to participate. Baker College Online is a member overall, but not of ELI, which we need for the Webinars and what not. Here's the basic Membership Info.
The Virtual 4T Conference is mainly geared toward K-12, but it is free and virtual.