[X4U] alternatives for iSight camera?

[Joe Sporleder]

Our small publishing company uses a mix of Mac minis and iMacs. All in use right now are new enough to meet the system requirements of Lion, even though we are still on Snow Leopard. We have times we'd like to use video iChat as well as Facetime and wanted to know what y'all would recommend as a good alternative camera for the Mac minis, since they don't have a built in camera.

Joe