Here are some of the websites I frequent:

Informative

Slashdot - News for Nerds. Stuff that matters.
Michael Yon- fantastic independent, imbedded reporting of the Iraq situation
StratFor - exceptional geopolitical analysis of current events. Free newsletter available.

Triathlon

BeginnerTriathlete - good forum; free training plans
Slowtwitch - targeted to more experienced triathletes
TriNewbies - more competitive atmosphere than BeginnerTriathlete, but still useful
50 Swim workouts - random site with a good variety
TriFind - search for events in your area

Friends

the Beeler’s webpage