Personally, I just assumed she bit it with the rest of the Jedi on Dantooine when the place got pummelled. (If you turn her before Dantooine gets wasted she winds up outside the Jedi acadamy) Perhaps she'll show up in the ruins of Dantooine in KOTOR2... Then again, Obsidian might try to avoid recycling characters like Yuthura. She's a relatively minor character with a highly uncertain fate in KOTOR1. If the questions in the opening chapter about Revan's past actually get down to the level of Yuthura they are going to seem like an interrogation! I suppose they could find a subtler way to ask about her fate on Dantooine though.
But still in the realms of possibility. For example, when choosing a LS ending, your PC could answer something like this:
"Revan, when redeemed, did several deeds that should be put as a prime example for the Jedi, like redeeming one of Korribans highest ranking Sith. I think her name was Yuthura something..."
A bit naive, but still possible :ph34r: