I think it can work. As long as the domain name is solid, you can have a .net .com .info I don't think you should have a problem with .info. carlos Try http://fastjoe.com/1 it's FREE!
Yes, you can use .info domains for your miniu sites. I use them for my simple landing pages and they work well.
Yeah it'll work, but a dot info doesn't carry as much weight as a dot com if you're doing SEO... meaning that you'll rank higher with a .com than a .info in the search engines.