this page can be helpfull for you:http://java-virtual-machine.net/other.html
blackdown is listed with MIPS support, but on the project page there is no MIPS Port mentioned.
thats sad, because it is the official linux port from java.
so there are Kaffe + SableVM...both are "Java Virtual Machines" and can be compiled from sourcecode...but they may couse some problems as they lack some key features that might be needed for the applications that you may want to run. But they seem to be an alternative.
LS1 (2.6 kernel, foonas svn1062, 750 GB, UBoot 1.2) & LS Pro (FreeLink/jtymod/GenLink, changes all the time)Thx to all donators!