Take Offline

http://www.ntop.org/demo/ntop/win32/
Download option 1, its a self contained binary, libpcap and ntop all in one. The second version is for installing on a u2 cruizer micro flash drive.
The option to register to rid yourself of the pesky 1000 capture limit, http://www.ntop.org/support.html
Link is embedded in page, but was not a different color from regular text in FF2....
No need to compile yourself =) And registration is free.