Security Camera ,

That is extremely expensive technology. It is now widely used in "industrial" settings--businesses, large institutions such as hospitals or universities, manufacturing sites. The cost would be almost prohibitive for use in the home. I refer to reliable equipment and systems.

Therefore, i conclude that this thread is an attempt at viral marketing. I would warn anyone else reading here that reliable technology of this type would run to tens of thousands of dollars. One need also ask where the video is to be streamed to--for what purpose. I smell a scam.

Just to be clear, for someone who is genuinely interested in such a question, and not just bent on a viral marketing attempt: asking for wireless systems raises the price enormously, unless you accept a very low quality. You can get a cheap, wireless system which will deliver a crap image, or you can get a high-quality wireless sytem, and pay a hell of a lot of money. One has to ask why someone wants a wireless system in a home, too, other than in an attempt to convince a potential customer that it can be done cheaply. Even with a wireless camera (and once again, why would one feel the need for that?), the image has to be sent to a computer or a server which has internet access in order to provide the "live," streaming image. The receiver equipment for the image is almost always a DVDRW, and even with advances in technology, those are not cheap. You're not going to get a good system producing a high quality image cheaply. If this really were for home security, a few glass breaks and some PIR motion detectors can provide that security for a small fraction of the cost of a camera system, and reporting in "real time" to a commercial security contol center for about the cost of a monthly cable television subscription.

Amazon has a few such options. Have you tried looking there?

Here's one of them:

http://www.amazon.com/D-Link-Wireless-Internet-Security-802-11b/dp/B0001BXV9U

This one has a night vision mode:

http://www.amazon.com/Foscam-FI8918W-Wireless-Network-Viewing/dp/B0046710G6/ref=dp_cp_ob_e_title_0