Here is a summary of the Hasbro SDCC panel from yesterday

Generations:
40 toys in the new line.
Fans are saying they want a Metroplex toy, and the response is "stay tuned..."
G2 Bruticus is a joint Amazon and Big Bad Toy Store exclusive
Bruticus comes in G2 packaging, complete with a retro 90s Hasbro logo!
GDO line is coming to the US! TRU exclusives later this year
Impactor, Twin Twist, Top Spin, Roadbuster, Whirl!! Remoulds of the Combaticons, they combine to form Ruination!
Voyager Blaster with Rewind, Eject, Steeljaw AND Rampage - retool of Soundwave/Soundblaster
18 Generations toys in Spring 2013
GRIMLOCK CONFIRMED! Voyager-class. 2013 Wave 2.

Prime:
First Edition toys will get a mass release in the US later this year:
* Entertainment pack (Deluxe Megs and Prime, humans, DVD)
* Voyager Prime & Bulkhead
* Arcee, Starscream, Terrorcon Cliffjumper(?) and Vehicon
TF Prime Season 3 will start later in the year.
Voyager Thundertron & Ultra Magnus
Skyblade (Wave 5)
Dark Energon:
New series, translucent decos with new faction symbols: Bumblebee, Knockout, Starscream, Wheeljack, Voyager Prime & Megs - at BBS

DOTM:
Hasbro are still trying to get those last waves on the market.
Presentation showing the Universal Hollywood/Singapore-exclusive toys (already on display at Hasbro's booth)
Amazon Jetwings Prime, November 2012 release
Year of the Dragon Ultimate Optimus Prime is an Amazon exclusive (pre-orders already up)

Rescue Bots:
"Bots and Robbers" Police HQ set.

KRE-O:
Microchangers: Blast Off, Rampage, Hook, Dirge (on display at their booth)
Devastator, Bruticus, Predaking and Superion Combiners (as we saw)

Bot Shots:
24 singles to be released through 2012
2013: Jump Shots, Spin Shots, Flip Shots, Blitz Shots. Lots of shots!
Singles: Sunstorm, Shockwave

Masterpiece:
Thundercracker will be out at October, TRU exclusive, with a light blue deco

Chrome Exclusives:
Linkin Park Gold Chrome Soundwave - images at TFW2005.com