Thank you all for your suggestions regarding my baby sorc. I got to create and play her for the first time last night and it left me with quite a lot to think about. Here's where I'm thinking of going with her now:
The first thing I've noticed about this group is that where usually I would worry about being effective, our party is made up of 8 characters - 2 fighters, 1 cleric, 1 rogue, 1 wizard and 3 (THREE!) sorcerers. So, after thats night, I'm moving from wanting to be effective to wanting to be unique. So, I've decided to go ahead with the illusion. She just hit 3rd level last night, and I couldn't think of any other good feats to give her, so she got Combat Casting and Spell Focus: Illusion. I have one more feat to assign, so maybe you guys can help me. Should I go Greater Spell Focus: Illusion or Spell Penetration? Or something else entirely?
The next thing I've noticed is that it's hard to find that fine line as far as Seline's memory. So I think it's not going to be quite as bad as I originally thought it was. But it's still pretty bad. She can socialize perfectly well with people, but for example, she and two other new characters had been in the jungle for three months prior to joining up with this party, and I can picture her asking quite often: "Ack, I can't remember - is the blue fruit poisonous or the purple one?" Also, it will effect her perception of her past - because she can't remember her past. Little pieces here and there, but not a whole lot.
Finally, after letting the character bounce around in my head last night, I've decided to make her a sorc-bard. There's a history idea I'm thinking of using for that - basically, her father was a great bard who kind of... left... so that's partly where her innate talent comes from. She just hasn't had the opportunity to realize that her gifts are as much melodies in her head as they are arcane spells. I like this idea for the mechanics, too. We don't have a bard in the party and it would give the party a second quasi-healer. It also would make a lot of sense with illusion. At the same time, she wouldn't be a normal bard - I'm not giving her ANY knowledge skills with her bad memory. But as I mentioned earlier, her instinct is pretty reliable which will be mostly where her bardic knowledge comes from when she gets that ability. And of course, her charisma is already high, so we're good there. And surprisingly, bluff is actually a class skill for sorcs, so I ended up taking it. And her familiar is a snake, who even gives her a bonus to bluff. I guess I figured if she's going to be able to bluff anyone, anywhere, she might as well be an illusionist!
So, that's where she is now. But I'm still looking for suggestions. What 3rd feat should I take? Any other things I should keep in mind for a sorc-bard illusionist? And then there's equipment. We had the chance to spend our gold last night, and there was a decent amount of it. But... what the hell does a sorcerer need? I ended up with two 1st level wands and I'm thinking of adding a MW instrument to begin her exploration into the performing arts. But I still have around 1500gp left. Should I save it up for a cloak of charisma? Any other thoughts? Anyway, thanks for everyone's help and if you are still interested, I'll continue to keep you informed. I'm SURE I'll have more questions.
(X-posted to dnd_women