I've been using robotic parts in career mode mainly to have probes and the like fold up to fit better inside fairings. If you don't like part clipping, look away.
This Surveyor-inspired lander uses hinges to move the legs to a wider angle for a more stable base (added to the gear action group, works perfectly), a piston to extend the solar panels and antenna, a hinge to increase the antenna's extension from 90 to 180 degrees, and a servo to rotate the panels around to match the sun - a problem I used to have with static solar panels on landers. The servo rotates with the left/right translation controls, which works great. I just right click a panel and hit J/L until it gets to maximum sun exposure.
I could also use the servo to point the dish at Kerbin or passing Mun orbit relays, but that has no in-game effect of course.