Are text messages, contacts, documents etc still indexed by tracker? And is there a global search interface, like there is on the N9 (and Symbian/N95)? I actually like that functionality.
No. Such a thing is a large can of worms (hard to do, hard to do performantly). If you ever experienced smartsearch sucking up your battery on the N9, that's why. This doesn't mean it won't ever happen, but it isn't there now.