BuddyPress.org

I don’t think a Twitter-like functionality will be added to the BP core but this can be done now with around 10 minutes of work.

All you’d need to do is create a blog such as whereareyou.domain.com. Then add all existing users as authors and auto-add new users as authors to the blog (see this post for details on doing this, it only takes a minute). Finally install and tweak the prologue theme to suit your site. The updates users post to the blog will automatically show up on their profile like other blog posts.

This is a really basic implementation of a “Twitter-like” functionality, but with a little tweaking this setup works really well.