Yes. If you're email and BBM works than you're good. They don't have a separate "Always Shout and Infinite Mobile" and "Always Shout and Infinite Blackberry", it's just "Always Shout and Infinite" for everyone. BIS is just the Blackberry service, you NEED it for any blackberry to work, and it doesn't matter either way for other phones. So Infinite Blackberry will allow you to use any phone (BB and non-BB) in the future.
Some people just don't get that online forum posts shouldn't always be taken seriously.
$99 10GB/month Can/US/Mexico, 1000 minutes, free evenings and weekend
$99 10GB/month Can/US/Mexico, 1000 minutes, free evenings and weekend