I have several:
Components: Digikey, Jameco, Tayda Electronics (cheap overseas, great for passive stuff and occasional semiconductor bargains - check out their price on MAX7219!)
Kits/Sensors: Adafruit, Sparkfun. Both are great and need our support. Honorable Mention: Polulu.
Samples: Anyone who will send me one for free, which so far is everyone except Cypress
. Big thumbs-up to TI, AD, and Linear.
In USA orders from China also take about 2 weeks. It seems they send them through the Port of San Francisco for me and there USPS to Chicago.