On the home (today) screen, there are 3 sections for Messages, Calendar, and SMS/MMS.
Does anyone know how to get rid of the SMS/MMS section, so that the rest of the screen real estate can be used to display more items from the Messages and Calendar sections?
Nope, the only way to get rid of that section (I assume you are talking about the 3 icons on the left of the screen) is to contact the developer and have him make you a custom theme (which he will do)