Always on Top

Pushpin is freeware that appears to work pretty good at keeping windows on top. Handy for use with the Wiscons.com birdcam (try the Show TV).
Found it at Snapfiles.com
GhostIt is also kindof cool but only works on XP or 2000.

Some video capture cards

This article talks about Videum AV by Winnov and the Osprey 100 by Viewcast.
They talk about cards between $150-200 and resolutions of 640x480.