I did an introductory session on REST at SEACON today – pretty much the stuff I've been talking about for quite some time now. There was a twist, though: The projector (or my laptop, or the connection between them) didn't work, so I fiddled around with it for a minute, and then decided to do the talk without slide support.
Interestingly, I think it went better than usual – I knew exactly what I wanted to say, and I didn't feel the need to get through any material. Feedback indicated that the audience liked it, too.
Maybe I should do this more often. Slides – even if they're not text-oriented bullet point catastrophes – may be overrated.
Update: Here are the slides in case you're interested (in fact, it's only the part that I think I covered).
Slides are quite overrated indeed, but visual examples are useful. Did you use a whiteboard or something like that in your talk? If not, would you say the talk could be even better if you did?