I got bored the other day and made this, and thought I might share it. It's a Mars Sundial, displaying MTC, Ls, Local Solar Mean Time (LSMT), and solar elevation for each of the active surface missions. It's based on the Mars 24 algorithm given here.
To install onto iGoogle, click on "add stuff", and then "add feed or gadget" down in the left-hand corner, and copy the following URL in:
There's also a standalone version here: http://www.public.asu.edu/~sbporter/MarsSundial.html