I've been incorporating some houserules to give my 4e game a more old-school feel, as I would probably be running a 1e game if my players didn't love having powers so much.
One thing I'd love to do is figure out a good way of doing treasure XP, but I've had trouble figuring out how I want to do it.
I'd like the XP per level to be roughly 75% treasure and 25% combat (I also throw in other XP rewards when appropriate, but don't plan those--they're extra). On the combat side, it's fairly easy: I just cut monster XP by 3/4.
The hitch with using the parcel system with treasure XP is that monetary treasure per level doesn't scale the same as XP required per level. That's fine, as I don't really like the parcel system or 4e economy much.
What I'd like to do, I think, is use a roughly-1e treasure distribution model and keep the 4e XP curve. (I'm also using the DMG2 suggestion to radically trim magic item distribution by building those bonuses into character progression.)
I know I'm house-ruling a lot, and you might not have an answer for my specific set of houserules, but I'm interested to see if anyone else has incorporated treasure XP into 4th edition.
What I'm NOT looking for are reasons not to use treasure XP or suggestions for other XP systems. I'd be glad to discuss why I like treasure XP, but I'm not currently wanting to do session-based leveling or anything like that.