I have to disagree with you about LaTex being slower than word for equations. In fact, one of the big reasons I started using it was faster equation typing. And when word2003 was upgraded to 2007 or whatever came next, they actually changed the equation editor to allow latex style entry so you didnt have to click through the menus to get symbols.
What kind of shorthand do you use with your script? I honestly find latex's shorthand already short.