Mark your folders with emblems to spot them easier.
Browser mode is also avaible to offer a familiar interface for people migrating from other systems.
Nautilus should come bundled with your distribution.
The latest releases can always be found at the GNOME ftp site.
The latest stable release is 2.24.0
Make sure to get the latest release of eel, the extra library that Nautilus depends on.
Bugs should be reported under the Nautilus product of the GNOME Bug Tracking System.
You can get in touch with developers and other users by sending a mail
to the nautilus mailing list [Archives]
or by joining the #nautilus channel on irc.gnome.org.