Don't forget to search the archives here; there have been a few threads about smoothies recently.
This week I'm drinking smoothies made out of:
frozen strawberries (a handful)
frozen blueberries (handful or two)
tofu (a slice, maybe one inch, off the block)
OJ (coupla glugs)
wheat germ (tablespoon)
spirulina (a teaspoon)
honey (a teaspoon or two)
Sorry for the imprecise measurements. I don't measure!