Ideas for talks at upcoming conferences?

I was just in a meeting with the Visual Studio UX (user experience) team. Someone brought up the topic of upcoming developer conferences and whether or not folks from the UX team would be attending. Then someone suggested that we could even consider doing a talk (or talks), as well as attend the conferences.

Nobody from the UX team has presented at any of the recent (last five years) developer conferences so we have no idea whether or not this would be worthwhile and of interest to other folks. We'd love to know what you think - are there topics that you'd like the UX team to present on at any developer conferences in the near future? If so, what are they? For example, would a talk on API usability be of interest?