Well, looking at the pre-draft rankings (they've been pretty decent - except of course for Vollmer!) very good talent remains at -
RB - only 4 drafted so far. Several backs with 2nd round numbers remain -
G - only 2 taken. Duke Robinson, rated by some as the best G in draft other than Unger is still there.
TE - only 2 picked from what was said to be a strong group. Nelson, Cook, Coffman, Ingram, all still out there. Some of those guys were considered close to 1st round talent.
ILB - only 2 taken. Not the strong position in this year's draft but a number of these dudes were expected to be gone by now.
QB - Only White went after the 1st round, 4 total so far.
DE - 7 taken but this is a group usually tapped early, still some highly graded guys like Gilbert, Sidbury and Johnson left.
So...if we don't trade, my guess is G, RB, TE, DE, in that order in the 3rd.