My hand picked links of choice.

photo.net  Run by Philip Greenspun, this is the first site anyone interested in photography should visit.

The Nikon Digest  An incredibly useful resource relating to Nikon photographic equipment, and photography in general.

The Medium Format Digest  This is the best resource for people who are into MF photography, or interested in starting out in it.

Medium Format Articles  Maintained by Robert Monaghan, this is one of the most comprehensive sites on MF photography and equipment that I have found.

Adorable Toshiba Libretto   Probably the most comprehensive web site dedicated exclusively to (power) users of the Toshiba Libretto.