1. Tony lost his memory completely, not really remembering anything and Steve had found him unconscious somewhere and taken him back to his apartment. Steve had a little brother (I think) and took care of Tony. I'm fairly sure that Tony and Steve began falling for each other and then Tony got his memories back and went back to his business and Steve thought he'd never see Tony again or something like that. Tony just kept showing up at Steve's place and in the end (I'm fairly sure) they got together and Steve and his brother moved in or something.
2. The team minus Tony are sent to do recon or something by S.H.I.E.L.D. and they stumble across Tony. Tony is hooked up to this machine that is using his mind for something and the enemy has him in some kind of...coma or something so that he doesn't need to eat/drink/sleep/etc. It was being hooked up to this machine that led SHIELD to send the team to do recon because Tony had sent out a signal. Steve steps in to save Tony from the situation.
And...that's all I've got so...hopefully it's enough for someone to help me find them.
EDIT: Both of these found. Thanks to those of you who knew which fics I was talking about!