I'm glad I learned about SpeakerDeck from Samuel Goodwin, who used it to share the slides from his presentation at last month's CocoaHeadsNYC. I used it to embed Bob Clair's slides (also from last month) and again this month to embed Isaac Schmidt's slides.
SpeakerDeck seems great not only for sharing but for discovering interesting presentations. Henceforth, unless I find something about SpeakerDeck that changes my mind, the CocoaHeadsNYC slides will be at <http://speakerdeck.com/u/cocoaheadsnyc>. The only drawback I can think of is that too many embedded slideshows might bog down the load time of the CocoaHeadsNYC home page. If that turns out to be the case I'm sure I can tweak WordPress to show fewer articles per page.