For my current City State online AD&D game I'm giving a lot of XP for roleplaying and social accomplishments like recruiting allies, rescuing (and possibly seducing) damsels in distress, gathering information, making friends, as well as for killing things/people and taking their (usually meagre) coin purses. The baseline is around 100 XP per hour of meaningful play. After 4 sessions I have some PCs close to 2nd level, but with only few coins in their pouches and looking for a big score, which feels very Fafhrd/Mouser/early Conan.
The 4e DMG2 also suggests something similar - XP equal to a level-appropriate challenge per hour of meaningful roleplay, which at 1st level is 100 XP per hour. I think that may be a bit much for 4e, that means you level after just 10 hours of talky stuff (in 1e at 100 XP/hour it's around 20 hours, depending on class), but for those who don't totally reject the premise of roleplay XP, I was wondering how much you think is appropriate?