We are seeing a proliferation of remote viewing of IP cameras. There are many ways to accomplish this, both free and not free!
The free solutions are limited in functionality, but helpful. The not free solution we find to be the BEST, although limited to Milestone solutions, is the C3 from Lextech Labs. Why? Here is what sets it apart from ANY other remote viewing solution:
1) It supports up to 20 cameras in a 5×4 layout, with the ability to intuitively double-click on any camera view for enlargement
2) You can have a 2×1 configuration with live viewing on one side, and playback on the other
3) The iPad support is VERY strong, but your single license is flexible for use on an iPod Touch, iPhone, Blackberry, or of course, via a browser
4) PTZ controls work great, the link is secure, and multiple camera views can be time sync’ed
For more info with a longer list of benefits, check out: http://www.lextechlabs.com/products/pick-your-platform/
For a demo, go to: http://www.lextechlabs.com/products/ira-c3/