Already used it to settle a dispute (between me and my girlfriend) ;) – Nolo's English Law Dictionary Review

This is a pretty handy little tool. The funny thing is my girlfriend and I were having an argument about what is and what isn't blackmail. So we had an "iPhone moment", I pulled out the ol' iPhone and this dictionary settled our little friendly disagreement (she was right, bummer).
Review by FoldingFool on Nolo's English Law Dictionary.