Advice on a cheap home CCTV system

Maybe OT, maybe not - not entirely sure :-)

Anyway, for various reasons I'd like to install a CCTV system in my home. Any images taken would be limited to being on my own property, and anotice would be placed at the enterance to the property explaining the situation to cover myself under the DPA - lets leave the legal issues to the uk.legal thread I'll be starting up :-)

My ideal system would allow me to add as many cameras as I want, and view them remotely over the net. Sending the images to remote storage (FTP server, email account or similar) would be almost essential. Realistically I don`t expect to get a system that will run 100 cameras for my budget, but I've seen something that I think might help. It is a camera server that allows me to connect 4 cameras, and an audio feed. It can be bought for under £80 here

Now if I get this and buy 4 normal CCTV cameras (a cheap source for these would be greatly appreciated) I'd have a system that would let me have 4 cameras, sited where I want them (within cabling restraints), viewable over the internet without the need to leave a PC running 24/7.

I could get an entire system up and running for under £200 without shopping round for cheap cameras - what do people think? I'm posting this to a few different groups, and hopefully between them I'll catch enough people who understand what I'm rambling on about to help me :-) The main questions I have are:

(1) Do people think this is a reasonable system? I could get say 2 independant IP Cams for this much money, but this system would give me twice as many cameras (2) Does anyone have a decent source for CCTv cameras? Black and white is fine (although colour would be nice). Ideally at least a couple of the cameras would have decent dark-vision (a limit of 10m would be more than enough) - cameras that include their own IR lights/LED's and ideallt waterproof housings would be ideal (3) Anyone able to suggest a better system? 4 cameras would be a bit limiting (although I know I could add another server to this idea, that makes it unweildy). The alternative I can see if normal USB webcams and software on a PC to run them and provide the same service. This would probably be a bit cheaper (depending on the cost of the software - anyone got any suggestions for this), but would require a PC being on 24/7, adding to the running costs.

Thanks everyone for any help you can give me! I am in the UK incidentally.