Registration has been improved for easy online access with secure Pay Pal payments for added security. You can find all the details on the event by clicking here.
They have also revealed a concept sketch for their first exclusive dubbed "Vector Zeta", which appears to be an add-on set for Classics Optimus Prime. No word on who is manufacturing this set. Visit their website for further details.

Our first exclusive, and newest member to our comic book crew, is Vector Zeta. He is available in extremely limited quantities for pre-registrants, but will be available for order at the convention.
We look forward to see you at Slagacon 2011!
UPDATE: Due to a technical issue, we’re temporarily removing the Vector Zeta figure from the pre-registration page. He will return for pre-registrants as soon as we get the issue cleared up. We are aware there is a great deal of interest in this item, and working hard to get Vector Zeta listed again. Sorry for the delay, and thank you for your understanding.