What happens if you type exit in the terminal? Can you paste in a post the list that results when you type top ? Mine (a bit of it) looks like this:
Processes: 51 total, 2 running, 49 sleeping... 144 threads 23:44:16
Load Avg: 0.43, 0.22, 0.19 CPU usage: 26.3% user, 15.3% sys, 58.5% idle
SharedLibs: num = 124, resident = 28.6M code, 3.13M data, 7.56M LinkEdit
MemRegions: num = 6076, resident = 131M + 11.4M private, 70.5M shared
PhysMem: 55.0M wired, 64.4M active, 217M inactive, 336M used, 47.4M free
VM: 3.16G + 85.3M 409092(0) pageins, 270916(0) pageouts
PID COMMAND %CPU TIME #TH #PRTS #MREGS RPRVT RSHRD RSIZE VSIZE
9147 top 9.2% 0:02.54 1 16 25 256K 404K 2.12M 27.1M
9146 bash 0.0% 0:00.01 1 12 15 168K 860K 1.27M 18.2M
9145 login 0.0% 0:00.06 1 13 37 140K 396K 2.34M 26.9M
9144 Terminal 0.8% 0:06.37 3 61 129 2.99M 14.0M 15.3M 107M
9140 AppleSpell 0.0% 0:00.13 1 37 36 660K 1.17M 1.78M 36.3M
9137 Mail 0.0% 0:31.58 8 157 254 6.01M 27.2M 19.4M 127M
9135 iChatAgent 0.0% 0:00.78 4 65 63 880K 2.30M 3.22M 70.2M
9134 iChat 0.0% 0:08.97 7 200 211 3.34M 18.1M 9.30M 130M
9132 Safari 17.6% 11:45.50 7 118 610 89.2M 26.8M 88.3M 215M