>> Can NetBSD/macppc support more than 128MB of RAM?  What option(s) would
>> I have to add to my conf file to support it?
>> 
>	options BUGPAGES will probably help - see
>http://www.netbsd.org/Ports/macppc/faq.html#cannot-allocate-vm-panic

It should be fixed in -current.  Could you show me the panic message?