Not everywhere, but if you mine efficiently you will find a bunch of them.
Strip mine at layer 12-13 and you will find them easily.
no kidding, its not like you have to have a diamond drill, the regular works fine, also make a bat pack, then upgrade to lap pack for longer mining excursions
and as far as power goes, enderstorage and BC makes exploiting the nether a snap. though if you have RP2 installed, the volcanoes are also great sources if you don't want to use the nether.