Vidiac

YouTube gets the job done. It's so popular you can even use it as a search engine and get meaningful results.
Vidiac hasn't achieved that level of popularity. But I gave it a try and I like the results. They use the first frame of the video as the static image of the 'startup screen', so you have some control.
And for Windows machines they offer "Vidiac Live" which is streaming video for your webcam. I want it!

Here's the Vidiac version of the same short vid I posted on YouTube 11/20/06