Wait--do I take it that you were invited to present at this conference? And that you had to do some stretching to come up with an appropriate presentation (albeit one you were, in the end, satisfied with)?
Yes, this is correct. In the end, it was an interesting experience that exposed me to some challenges related to an area I would otherwise not have explored. Because of what I learned--mostly from the challenges discussed by audience members after the talk--I may pursue this further as a research area. However, the process was nerve wracking--they told me the audience would be in the range of 300-400, which was (fortunately for my stage fright with very large audiences) wildly optimistic. The audience ended up around 40 or so, which I feel is well within my previous experience as a speaker. I am tenured now, so I kept telling myself that this little speech didn't matter. However, I still had some pre-speech anxiety in the days leading up to the event. Once I'm up there on the podium and very prepared, I seem to do fine, or at least as best as can be expected given my expertise level.