Re: Sorcerer/Rogue Hybrid Recommendations
Have you considered simply playing one class or the other with a multiclass? I realize that it's not quite the same thing, but having played around with this combination a bit myself I can assure you that you'll have difficulty keeping up with a group that's "fairly into optimizing" without some neat tricks yourself.
Based on what you've said, a sorcerer multiclassing rogue sounds like what you want. Pick up the feat from PHB2 to let you use ranged spells at melee through a dagger - Sorcerous Blade Channelling, I think it's called - and if you have access to dragon look into an article about 'The Shivs of Sorcery' for some more melee options. Sneak of Shadows nets you a 1/encounter sneak attack, of course, as well as Stealth to shore up your semi-rogue abilities. A background will net you another skill as a class skill (I advise Streetwise for a Changeling) and you're in business.
If I creep into your house in the dead of night and strangle you while you sleep, you probably messed up your grammar.
Ignis Equine by Akrim.elf, may that name be famed forever.