Ray
I can't really comment on NetBSD 3 because I've been swamped and
haven't done much updating for a while. But I did apply the patches
(and July last year sounds about right) and it's been rock solid for me
on my DS5300 (white box version of the AS1200) with 2 processors.
To be honest though, I haven't really stressed it that much so I can't
promise there are no gotchas under heavy load though.
BLS