Protocol accounting analysis program?

[Rock Lobster <rocklobster () cheerful com>]

Hi,

Whats everyone out there using to account for the amount of traffic different protocols are generating?

I just can't seem to find an application (linux or windows) that will do the trick.   I can find plenty of applications 
that will let me know the quantity of traffic that is ultimately flowing in and out of my interfaces, but I want 
something that lets me know how much traffic http, ftp, irc, rpc, or whatever I flag generates.

Preferably somethinng I can monitor through http too :)

I've checked freshmeat, deja/google etc relentlessly.