I dont know how much this will apply to, but it would work for everthing Non-CVS related. Pretty sure most of you have heard of 7zip, but I dont see anyone using it here. Anyhow, here is some quick numbers for it incase you guys might be interested in it.
Code:
Zip File 7 Zip File
= EqEmu 992 - 1.45 MB 759kb
= Map Pack - 336.5 MB 248.3 MB
= New & Old
= MiniLogin - 138kb 101kb
The smaller the amount, the less difference, but witht the Map difference alone, it would trim quite a little bit of the download time for people with a little slower connections. Overall just for the stuff here on this site, your looking at a saving of almost 100MB.
Anyhow, im just ranting on about this, but I Still cant belive how good the compression is on 7zip, to be open-source and free. Just goes to show you the best things in life are free....... /end rant