That's great! The A-Z list will definitely help idiots like me who couldn't find stuff!
I did wonder if the limitations of the search were down to tumblr "functionality". I guess they don't really intend anyone to use it for anything vaguely serious? To my ageing eyes most tumblr pages just appear to be pointless random splodges of consciousness spewed out by kids and any attempt at coherence is purely unintentional!