This has loads of links to other sites, wallpaper, player stats ands the like.  It also has a great player look-alike area that I highly recommend!

As for the other sites www.nzherald.co.nz has good rugby articles with a far range of guest writers including Fitzy, Richard Loe etc.  Also www.tvnz.co.nz will have articles as well as short video clips to show . 

I've also heard good things about www.stuff.co.nz which while primarily a news area has good links to rugby stories that haven't made the larger publication.

A couple of others I know of but haven't really looked are www.scrum.com and www.rugbyheaven.com