Yes, they're alive. We moved them from the bag to a little container and we fed a few of them in all of the tanks - guppies loved them, male bettas acted like they didn't know what to do with them, but the females gobbled them up.
We'll divide the rest up among the tanks tomorrow I guess, then get some of the other things mentioned. I have dried bloodworms that I may try too - the bettas like those for a special treat sometimes. bloodworms....ok, that just sounds gross..