The defacto standard for small parts ordering. Once you get used to their interface/search engine, you'll cuss at every other parts website out there. They are great. $25 minimum order. Same day shipping. They have a lot of stock items, but a lot of non-stocked items so don't believe the catalog.
www.digikey.com of course
All major credit cards accepted. Many shipping methods. I believe they ship to USA, Canada, and many other countries.