Max Blogs for one login Batch Create

RE: how many blogs max for one admin on a site?
Hiya I have to create 260 (or more) sites. One admin only but each blog has a few contributors. Should I batch create under one email address or split them up into a few emails. I think I read there is a maximum number before you get errors - is 30 blogs per admin email account too many? I can batch create 260 email addresses but that seems a bit silly.

I hope we can batch create groups soon - each site needs 2 groups each. That's gonna take me ages :slight_frown:
Cheers :slight_smile:
Laurel @SilkCharm