I'm using blue iris software, I'm very happy with it.gargoyle,
we have a wireless IP camera at our farm project;think the farm owner had to get an internet line just for it,plus they have a laptop hooked up with it as the server,its using an awful software though which relies on internet explorer or at the least IE rendering.
The motion detection is great, you can mask out certain areas, so for example if there is a bush in your yard that is always moving in the breeze, mask that out. when there is motion it can save videos, it can back up and save the previous x number of frames so you see what first came in and triggered the alert, you can have it send you e-mails or sms messages to let you know there is an intruder, etc... and it's easy to use.
The site for blue iris is http://blueirissoftware.com/ but I bought it from Foscam, it was discounted on the Foscam site. Your online receipt should have the activation code.