What I Use (Minnesota)

Soaring Forecast for Chanhassen, Minnesota
National Weather Service - Very nice. Roll your mouse over the cells in the table and it changes the views - slick.  Also the loop tab has good forecast views.
MN DOT Weather Links - Excellent!  Click on "First Time Log-in", You will have to provide some personal info, then you will be provided an access code via email. I got mine within a few minutes. When you get logged onto the site click the tab along the top of the screen for "MNDOT" Then click "Twin Cities Forecast".Launch Code Forecast for Faribault Municiple Airport, MN - on US Airsports Net - Very cool forecast overview table
Launch Code Forecast for Minneapolis Intl, Airport, MN - on US Airsports Net - Very cool forecast overview table
XCSkies.com - Awesome soaring forecast maps
BLIPSPOT for Stanton, MN - Text based weather data
BLIPMAPs for North Central US (These include SE MN) - Soaring weather prediction maps by Dr. John W. (Jack) Glendening, Meteorologist
BLIPMAPs for the Great Plains US (These include SW MN) - Soaring weather prediction maps by Dr. John W. (Jack) Glendening, Meteorologist
Air Sports Net Launch Code - Great forecast table for airports
WindMap - Click on the map to see wind at a particular location
Earth Wind Map - Drag the wold around and see the wind anywhere 
Aviation Weather Center - MN DOT
Flight Service - MN DOT
FAA WeatherCams 
Minneapolis Forecast - CNN
Minneapolis Forecast - Intellicast
Minneapolis Forecast - The Weather Channel
Unisys Weather - Great summary image with satellite, fronts, and radar 
WX.com
Airports Net - Launch Code - Stanton, MN - Nice forecast with cloud bases, etc.
Twin Cities Forecast - The Weather Underground
Minneapolis Satellite - Intellicast
Minneapolis Satellite Animation - Intellicast
Minneapolis Radar - The Weather Channel

Commercial Weather Sites
Intellicast
The Weather Channel
CNN - Weather 
Unisys Weather
WX.com
Windy.com

Commercial Weather Sites
BLIPMAPs - Boundary Layer Information Prediction MAPs give thermal soaring parameters over a geographic region. - by Dr. John W. (Jack) Glendening, Meteorologist - These are very cool!
Mountain Wave Project - Experimental Wave Forecast for Europe
Soaring Weather Reports - Kevin Ford 

Weather Servers
Landings' Weather Site List