UPDATE Sep 82009: Nikki’s sites are back!
I can see from my own web statistics that Nikki’s Sweet Dreams is becoming one of the most popular TG caption blogs around.
No wonder! It is updated on a daily basis. On some days Nikki presents more than one cap.
The design of the caps is traditional and based on the classic two panel layout (picture to the right, black text on white background to the left), but the texts are often very original and creative.
The imagery varies between soft and hard core.
There is also a sister site called Nikki’s Sweet Stories. That one is updated less frequently.
Transgender Fiction, Captions and Comics 
What happened to Nikki? Her blogs have been deleted.
I have tried to contact her, but get no response.
Rebecca
Tonight her blogs appeared just like they were. Maybe it was a blogger screw up.
Great news!
Rebecca