No real plans yet! It would be nice if there were some SMP games from that era but there aren't really any. I tried Quake 3 Demo with SMP enabled but it didn't seem to make any difference.
It runs Windows XP pretty well. Compared to my Pentium 166MMX which isn't even good in Windows 98. The dual CPU really helps with multitasking.
I'd love to get a pair of Pentium II overdrive chips that would help a lot I think. If I got that upgrade the system would probably work fine for most tasks.
You can easily max out both CPUs, but I think it runs better than a faster MHz single Pentium 2.
Long term plan is:
Dual Pentium II 333MHz Overdrives
Raid 1 160GB SATA
Voodoo 5 5500 PCI or 2xVoodoo 2 SLI (not really enough PCI ports for that)
Might go back to Windows 2000
That would make the ultimate dual machine!