Jeff actually presented that idea as an exclusive (more VOTC figures) to the guys at Target last fall. I think Hasbro and retailers know how well those things did, perhaps we will see them in future. One can hope at least.
Here's a list of possible Holo Figures I made last week:
Darth Maul Episode I Talking to Nute and Rune
This one actually got made, Scott. It's the WalMart exclusive holographic Darth Maul that was offered along with the holo Qui-Gon Jinn. It may not have been part of the basic figure line, but it is Darth Maul exactly as he appeared as a hologram in TPM.
Yeah I remembered that when I put it together but still put him on there
According to GH, there is a rumor for Anakin/Vader Holo as well as Spirit of Anakin