I use my PB for everything now. My BB took 2nd place, which means i dont pay to much attention to it or where i put it. BUT for the rare moments that i DO need my BB, i end up forgetting where i put it.
Then i thought wouldnt it be nice if we had an app that could find my BB or atleast trigger a lil alarm do i can find it. and vise versa from bb to playbook. even though its easier to misplace a BB then a PB.