... is a new tweak available for $4.99 (USD) on the Cydia store.
With it, you can make text (in your e-mail) that is bold, italicized, highlighted, with a strike through, a different font, many varying sizes, different colors or underlined.
Finally, a way to make your e-mail more than just plain text. Yay!
I've downloaded it and it works great. Just thought y'all might like to know...