To enable or not to enable

A question - does enabling multisite have any effects on a site other than perhaps enabling some multisite plugins? I'd love to use the "select language at startup" plugin, but I'm not that comfortable with multisite yet, and I'd hate to do something that would mess things up.

In particular, I'm wondering about Buddypress. I'm just doing a new install, and using groups instead of subsites for private member areas. If I enable multisite, will anything "nasty" happen to my new network? :slight_smile: Thanks...