Jake writes:
   Yes, this is a great idea.  But don't forget that, if you have /tmp 
   mounted on swap, then your left over swap space is like a big RAM disk, 
   so it isn't "really" wasted.  Besides, even though you can swap to a 
   file, swapping to a dedicated partition is going to be a bit faster normally.

How I do this on NetBSD_1.1?  If I have two smaller partitions (50 MB
each) dedicated to swap, and I mount /tmp on swap, can I put more than
50 MB of files in /tmp?