I've created a page at speakerrate.com for myself:
... and populated it with my two upcoming talks.
If you want to use SpeakerRate to give feedback to a speaker, you don't actually have to wait for them to create their own profile - you can enter it yourself.
I don't know if SpeakerRate will grow into the ultimate connecting-to-speakers webtool, but it might. I do know that they support microformats, which is a big plus in my book.
Hope to see some of you at Penguicon (this weekend) or IOUG Collaborate (next week)!