Detexify: Dymistify your LaTeX symbol

I write a lot in LaTeX and I forget a lot of obscure symbols I need. The solution: Detexify.  Detexify will discover the LaTeX formatting of any symbol you can manage to scrawl with your mouse. If you don't know what LaTex is then your probably not in academia, a student, or a publisher; it is a digital typesetting package.  Ignore this then and move along, otherwise I ask you...
How else would you learn about: \bat

Or have a little: \Heart

Or make real numbers: \Re

Or that one symbol you can't remember: \Denarius

And who can remember angstroms: \aa


Detexify is the work of Daniel Kirsch.  There is an iphone app too, but I am trying to figure out who has LaTex on their iphone?