Comment Re:What's old is new (Score 1) 823
If you can find an edition of OneNote 2010 (Technical Preview, currently), it's even better. OneNote 2010 has equation editing similar to that of Word 2007, which, if you've actually used, you'd realize has all sorts of Latex-like features, just that it's transcribed on the fly.
You can type
\int_-\infty^\infty 5xdx
or whatever, just the same way. Matrices are a bit different, but very much possible;
\matrix(1&0@0&1)
Creates a 2x2 identity matrix.
That said, don't pirate software.