Ok, my BP6 (2*433) has been running for hours.  I've rebuilt several kernels
and (mostly) completed a 'make build' without a panic.

I like seeing this in top:

load averages:  2.08,  2.09,  2.04                                     14:46:56
15 processes:  1 runnable, 12 sleeping, 2 on processor
CPU states:  0.0% user, 99.0% nice,  0.5% system,  0.0% interrupt,  0.5% idle
Memory: 4672K Act, 3660K Inact, 152K Wired, 104M Free, 256M Swap free

  PID USERNAME PRI NICE   SIZE   RES STATE     TIME   WCPU    CPU COMMAND
 3995 root     104   20   700K  412K run      68:06 99.02% 99.02% dnetc
 4055 root     104   20   700K  412K onproc   67:59 99.02% 99.02% dnetc
  101 root       2    0    96K  356K sleep     0:01  0.00%  0.00% ypbind
17136 root      28    0   152K  608K onproc    0:00  0.00%  0.00% top
17131 root      18    0   428K  280K sleep     0:00  0.00%  0.00% csh
  178 root      10    0   220K  416K sleep     0:00  0.00%  0.00% cron
    1 root      10    0   308K  192K sleep     0:00  0.00%  0.00% init
  181 root       3    0    48K  432K sleep     0:00  0.00%  0.00% getty
  182 root       3    0    48K  432K sleep     0:00  0.00%  0.00% getty
  183 root       3    0    48K  432K sleep     0:00  0.00%  0.00% getty
  180 root       3    0   428K  292K sleep     0:00  0.00%  0.00% csh
17130 root       2    0   112K  972K sleep     0:00  0.00%  0.00% telnetd
   96 root       2    0   336K  552K sleep     0:00  0.00%  0.00% rpcbind
  174 root       2    0    76K  444K sleep     0:00  0.00%  0.00% inetd
   86 root       2    0   108K  404K sleep     0:00  0.00%  0.00% syslogd

Excellent!  Way to go Bill! (and Jason, and everyone else)

-Andrew