Ok, first, there never was a Netscape 5.0.
A "Netscape 6.0" was based on beta versions of the Mozilla web browser, so it wasn't even a complete product.
Before 6.0 or Mozilla was "complete" (reached 1.0 status), and even before a Netscape 5.0 was released, we now have Netscape 7.0
It has AOL Instant Messenger, ICQ, Winamp, and a Spinner-like Net Radio all built in now.
- Oh, and I don't know if I'm missing something, but every version of Netscape/Mozilla I've used doesn't seem to take advantage of mice with more than two buttons. I'd really like to have a middle-click and scroll feature like Internet Explorer has.