People seem to say you *can* follow peeps on other instances, and I see others doing it, but can't figure out how to add from the UI. (FF and Chrome seem to choke on addresses with more than one @ in them. :expressionless:)
I could see some utility in a browser plugin that lets you follow someone from a chosen instance if you're looking at a user page on any other instance.
To sum all of this up: from a user's page on another instance, remote follow appears to be broken (d'oh!), but searching their full address in the bar DOES work.
@sjml you don't need different accounts to follow people. from here if you type a username into the search bar on the right you can follow people from any instance. try typing in @taeateh in the search bar.