In the iPad app, I see small icons on the left bar to show which SE site I'm on.... Useful, apart from the fact I'm a fairly casual SE user and don't know what half the sites are, never mind what the logo looks like.
A text indicator would be helpful, either in a ? Or info option in the 'sub-icons' that appear under each site's icon, or in the title when viewing the individual site.
Hopefully I'm posting this in the right place, but the fact I'm not 100% sure I'm on meta, probably says it all.