traffic monitor script..
 

<img src="http://www.reflected.net/~stats/hme/by-portid/port47_day.png">
see this graph? how can i get graphs like this from a win2k box? anybody know the program or anything?

THis is cPanel produced.
What kind of server managing software do you have?

If you router or switch supports it, you can use MRTG: http://people.ee.ethz.ch/~oetiker/webtools/mrtg/

See http://www.ee.ethz.ch/stats/mrtg/ for an example.

Do you just want to be able to view your site traffic and analyze them or do you want a server-side product that lets you resell this ability? If it's the latter then products exist, like Webtrends and even some open source stuff...

For just analyzing, I prefer to have Access download my logs and put them in a database where I can create reports, charts and such out of them. You can even use statistical software againts it (EViews, Mathematica, R, S...) to project future traffic and to find seasonality patterns.