You can read the news here under the March 2, 2009 entry - I first learned of it from a post on the All About Susie Yahoo Group:
R&D Dolls News
Susie by R & D Dolls will join the Integrity Toys' Dynamite Girls Electro Pop Collection later this year. I assume that this is a one-time collaboration since Susie will be exclusive to R & D Collectibles. Other information gleaned from the Yahoo Group posts is that this Susie will have the Dynamite Girls' body and rooted eyelashes.
Ah ... so many dolls, so little space, so few my funds!
Time to purge and sell.