Having worked in the wireless space for some time now, I can tell you that wireline replacement is a real motivator for customers to switch to wireless systems as soon as they are “good enough.” The cost to wire an industrial location ranges from $2/ft up to $2000/ft, which makes wireless a no-brainer if a solution is available.
Armida Technologies brings wireless to the video surveillance market. Their value-add is their software which encrypts the signal before sending it. In case of interference, they can still recover enough of the transmission to give the user a clean image.
You can see Armida and other wireless companies in the upcoming Wireless Seed Stage Forum held by the Austin Technology Incubator on October 17, 2007.