Wireless N routers based on MIPS SoCs are increasingly available CHEAP. Asus RTN13U, D-link DIR-615.D and Buffalo WHR-G300N are examples of units that have functioning versions of DD-WRT. Would a kind, benevolent hacker have already built a version of mjproxy for these? (If it's already been done, please post the link!)
It may be that more than one build is necessary to cover the different models, don't know. In any case, many thanks to those who do this work and make it available for all.
__EDIT:
Straightening out the confusion that led to this post could be helpful to others who are new to Linux, so here goes:
The mjproxy binary is not processor-dependent. The ipkg installer is. So the short answer is, just use the regular mjproxy binary (http://pagemen.110mb.com/mjproxy.zip). Then processor architecture (MIPS vs. MIPSEL) doesn't matter.
Those familiar with Linux in embedded systems seem to prefer ipkg files. But with so many of the routers currently on the market having only 4 MB of flash memory, ipkg handlers are left out of the firmware. Maybe ipkg installation is more convenient (?), but certainly not necessary.
Life is hard enough. One less wrinkle to complicate it.