STC did not offer a separate purchase option for SUMMIT@Click 2010 while registrations for the Dallas conference were in process. However, due to the overwhelming response of the attendees that participated in the Summit, the recorded versions of the presentations will be available to those who wanted to attend but were unable to do so.
The 2010 Summit offered more than 90 education sessions, with subjects touching on every area of technical communication. Over 80 of the sessions in the program have been captured and will be available starting this summer for those who did not attend in person.
STC’s SUMMIT@aClick offers these conference sessions as MP3 files, audio synched to PowerPoint, or video synched to Powerpoint. The purchase of SUMMIT@aClick also allows access to speaker materials where available.

Pre-purchase the 2010 edition of SUMMIT@aClick at the special preliminary rate of $149 for members or $299 for nonmembers. This discount rate is only available until 1 June 2010. After that date, the price will rise to $249 for members and $499 for nonmembers.
See http://www.stc.org/edu/special-advance-offer.asp (external link) for more information.
Thanks to @AndreaJWenger and the STC Carolina Communiqué Newsletter