I'd try to get some flow down there if there isn't much. You can always put a T from the return pump if you don't have one already, a ball valve on one end of it and lead it back to the beginning of the sump. This will take some stress off the pump if you have a ball valve on the return line and also up the flow through the sump.
Keep an eye on your nutrient levels (trates/phosphates/etc).
I'd just keep an eye out for crap building up too.
My $.02
(I'm giving my back a break from hand scrubbing 40ish lbs of live rock at the moment, so I completely agree with getting a jump on it and being concerned)