It might interest some of you to be able to filter your ListViews using a SearchView for the ActionBar. I made a little write up on this on my blog: http://blog.ostebaronen.dk/2014/03/filtering-listview-with-searchview-in.html
GitHub repo here: https://github.com/Cheesebaron/SearchView-Sample
It is pretty simple, but it does solves some issues with GREF counts going up and briefly describes how that is mitigated in the solution. One major thing to notice. ALWAYS dispose of Java classes if you can.