I like this vmstat/iostat replacement. It has nice pretty ansi colors…
—-total-cpu-usage—- -dsk/total- -net/total- —paging– —system–
usr sys idl wai hiq siq| read writ| recv send| in out | int csw
1 1 94 4 0 0|3686k 358k| 0 0 | 93B 104B| 369 1122
0 1 98 0 0 0|4096B 466k| 196k 242k| 0 0 |1149 2044
0 1 95 2 0 1| 50k 548k| 274k 4296k| 0 0 |2673 2181
0 1 97 1 0 0| 10k 1296k| 639k 426k| 0 0 |1246 1955
1 1 96 3 0 0| 0 1654k| 760k 199k| 0 0 |1275 2067
0 0 98 1 0 0|8192B 230k| 64k 167k| 0 0 | 375 764
0 1 99 1 0 0| 0 342k| 136k 186k| 0 0 | 928 1891
0 1 99 1 0 0|4096B 928k| 478k 43k| 0 0 | 704 1193
0 0 99 0 0 0|4096B 220k| 74k 45k| 0 0 | 234 535
0 1 99 1 0 0|4096B 88k| 73k 176k| 0 0 | 504 1035
0 2 93 4 0 1|4096B 2570k|1121k 208k| 0 0 |1783 3067
0 3 88 8 0 0|2048B 3430k|1520k 224k| 0 0 |2544 4391
0 0 99 1 0 0| 10k 268k| 74k 18k| 0 0 | 214 515
0 0 98 1 0 0|6144B 160k| 59k 66k| 0 0 | 276 597
0 1 99 1 0 0| 0 108k| 66k 164k| 0 0 | 370 781
0 1 97 1 0 0| 48k 374k| 170k 274k| 0 0 |1131 2295

Dstat is a versatile replacement for vmstat, iostat, netstat and ifstat. Dstat overcomes some of their limitations and adds some extra features, more counters and flexibility. Dstat is handy for monitoring systems during performance tuning tests, benchmarks or troubleshooting. Dstat allows you to view all of your system resources instantly, you can eg. Compare disk usage in combination with interrupts from your IDE controller, or compare the network bandwidth numbers directly with the disk throughput (in the same interval). Dstat gives you detailed selective information in columns and clearly indicates in what magnitude and unit the output is displayed. Less confusion, less mistakes.
Name : dstat
Arch : noarch
Version : 0.6.7
Release : 2.fc8
Size : 528 k
Repo : installed
Summary : Versatile resource statistics tool
URL : http://dag.wieers.com/home-made/dstat/
License : GPLv2