Now that we have the official backstory of Anakin Skywalker's rise and fall, what are the questions that you most want to see answered in the Expanded Universe (books, comics, television, videogames, etc)?
1) When will Luke and Leia learn about their mother?
There are enough survivors of Padme's inner circle that it seems pretty ridiculous that thirty years have been covered in the EU since the Battle of Endor, but no one seems to have told the Skywalker twins who she was.
Three years after ROTJ, Luke has learned quite a bit about his father. He knows he was raised as a slave on Tatooine, freed by Jedi during a podrace, and became a hero of the Clone Wars. And Leia learns quite a bit about Shmi during a mission to Tatooine. But five (?) years later, Luke is still grasping at straws when it comes to the other half of his parentage, and that's the last time it's brought up.
While it's true that only Bail, Obi-Wan, Yoda, and the Polis Massans knew that she'd given birth prior to her death, the commonplace knowledge that Luke and Leia were the children of Anakin Skywalker, AKA Darth Vader, should've rang quite a few bells with folks. Padme had quite a few handmaidens who should still be alive, not to mention her family. Mon Mothma is hinted to be aware of Padme's condition in Labyrinth of Evil, and even if she didn't know the two were married, she would've been able to hazard an educated guess. Heck, even Jar Jar Binks should be smart enough to put two and two together here.
Speaking of whom. . . .
2) Whatever happened to Jar Jar Binks?
No matter how the guy vanished in subsequent prequels, Jar Jar was being set up in 1999 for something big. And people didn't like him very much, so it didn't happen the way Lucas planned (and would never admit to now). So where is the doofus now? Palpatine didn't like aliens, but we see in ROTJ: DVDE that the Gungans are still alive and well as a race. Was Jar Jar executed as a loyalist sometime after Padme's funeral? Did he survive and serve on the Imperial Senate? Did he go into seclusion or start a failed career as a stand-up?
Seriously. Wherever he is, whatever happened to him, I want to know.
3) Whatever happened to Asajj Ventress and Aurra Sing?
I only lump them together because they're bad-arse Force-wielding bald alien babes, and everyone seems to either love 'em or hate 'em. And they both drop off the radar, for the most part, after the Clone Wars.
Asajj is last seen escaping into space following the Battle of Boz Pity (shortly prior to ROTS). She is uncertain of her alliances, uncertain of her future. Something tells me we're going to see a lot more of her shortly. A lot more.
I'm not so sure about Aurra Sing popping up again, though. She has a few run-ins with a young Boba Fett, then (as far as we know) drops completely off the map. We see her once again, shortly before the events of ROTJ, in Demolition, where she is supposedly a washed-up bounty hunter trying to make a comeback.
4) Who and where are the other Skywalkers?
We know that Shmi gave birth to Anakin, and that Anakin married Padme and begat Luke and Leia. Leia married Han Solo and had three kids (Jacen, Jaina, and Anakin Solo); Luke married Mara Jade and had a son named Ben.
But that's all we know.
We're unlikely to get a completely straightforward answer regarding Anakin's father. Lucas left this slightly ambiguous, and I doubt he'll approve anything that gives a definitive answer. But that only closes the door halfway. All we've ever learned about Shmi's past is that she was kidnapped from a starship by pirates, as a child or young woman, and sold into slavery. So it's possible that she still has family somewhere. Even if they're all dead, well, she still came from somewhere.
5) Where did the prophecy of the one who would bring balance to the Force originate? And is this the same as the "Son of the Suns"?
The prophecy is pretty confusing, and knowing exactly where it came from might help. Was it a renowned Jedi prophet? A Shaman of the Whills?
Which brings us to. . . .
6) What the hell is Yoda anyway?
I can't really elaborate on that. He and Yaddle seem to be the only members of. . . whatever species they are.