I added a Google "Wave This" button to my post "How Small Business uses Facebook for B2B" clicked on it, and whammo! It created a neat Wave.
That should improve the viralness of Waves. There's nothing better than instant!
Google explains how to add the Wave This here. Hopefully Typepad will build it in as a option soon.
I wrote this introduction to Google Waves a little while go for an IT in Aged Care Magazine. It's a little prosaic but if you're starting from scratch it explains the concept (I think!?).