After following minimos suggestion:

"du -sk * | sort -nr | more"

after getting the results from previous command, do "cd <top directory>" and repeat the process to pinpoint the fat culprit(s).

I got the fat culprits

opt # du -sk * | sort -nr | more
392988 realgolf2011
273868 gof2
201412 RealFootball2011
166940 gears
105748 airattack
104624 warmux
101392 ea-mobile-nfsshift
91944 BloodThrone
78656 rovio
74540 fennec
53768 castle-warriors
45264 ea-mobile-bejeweled2-full
42072 brainparty
41236 burn-the-city
28016 com.niasoft.alchemyclassic
27848 spotthedifference
23660 com.meecast.omweather
23304 cityscene
23280 ea-mobile-monopoly
22200 ripoff
18456 operamobile-labs
15460 JoseMobile