The best site for running your league is either myfantasyleague.com (much more customizable) or CBS Sportsline although their news and ideas are awful. ESPN lost me a long time ago and though they are usually first with a good NFL story or injury update their guys just don't understand the "fantasy" perspective.
As for information only sites I love Rotoworld.com for their news updates especially on Sunday mornings. I recently joined http://www.scoutfantasyfootball.com
just to read a story about Michael Vick but have been surprised at some of the views/opinions on there (mainly cause I have agreed more than usual).
I subscribed to draftsharks.com last year and was totally disappointed. $30 for three day old news and opinions that I could have got from one of my co-workers. Terrible!! I wish that there was someone to regulate these sites because what is advertised and what is delivered are completely different most of the time.