Yes stickam.com does support connections from Mac webcams.
download.cnet.com/mac/webcam.software
Webcams do not work with MSN for Mac because Microsoft didn't put a feature in for using webcams, alternatively you can use an online IM client to connect to your MSN account and use webcam via that service. Meebo is a free one, try it!
Ensure you are running the latest version of Messenger as on the Mac webcams are only supported from version 8. (See links below)
Webcams manufactured by Dell are easily seen as being the most compatible of all webcams. Whether you own a PC or a Mac, Dell will have a great webcam for you. Dell.com will have information which will find the perfect webcam for your computer or laptop.
Yes, as long as the software for each is enabled for each other to chat.
Webcams are available from many online stores such as Amazon and eBay. Also, there are many "mom and pop" computer stores which will have the best prices because of their low overhead costs.
No, although the vast majority should.
To run multiple webcams requires software designed for such a task such as EvoCam (See links below). If planning to stream live video over the Internet you will need to ensure that you have adequate bandwidth to handle the multiple streams.
you can get webcams at any electronic store
All Apple computers except the Mini Mac & Mac Pro have a built in Webcam. Logitech builds webcams that are Mac compatible. Just make sure the one you buy is.
Most webcams work under Linux; it would be very difficult to provide a complete list. This is because support for cameras is based on the chipset they are using, not the name of the actual manufacturer. Most cameras from Logitech, Aiptek, Kodak, Mustek, and Polaroid should work.
Macs have come with built-in cameras for many years. Most USB webcams can be used with older Macs that do not have a built-in camera but do have a USB port.