I don't get it, how is this different to simply manually typing in the equation? From what I can gather you'd type it out as though there were no latex and then paste it into MHF.
Either way it matters not to me because I run Linux
I know many of you are already MathType users, so I wanted to let you know that yesterday's release of MathType 6.6 for Windows includes a LaTeX translator specifically for Math Help Forum. Rather than give the full instructions here for how to use the two together, I'll point you to our MHF instruction page.
This new release of MathType also features handwritten math input via mouse, tablet, or touchscreen, and compatibility with other applications and websites, including Google Docs, Gmail, and WordPress.
Feel free to PM me with any questions, or respond to this post. You can also email me directly or catch us on Twitter at @MathType.
bobm at dessci dot com
For those who are already familiar with LaTeX, it doesn't provide much by way of using it in MHF, but many people in this situation still have to collaborate with colleagues who use Word, so MathType lets you use MHF equations in Word, or just type the LaTeX into Word directly.
But you're right -- not in Linux.