Lpc2000

>> While there is no specific reason that the ARM7TDMI-S in the LPC2000
family would not run uClinux, the issue becomes one of memory space.
  From my experience, you would need at least 2Meg of RAM / FLASH space
to hold the kernel + a small filesystem.  If you made the kernel +
filesystem utils XIP (eXecute In Place), then 1 or 2 Meg of RAM would be
needed to run applications. <<

Yes, you'd definitely need a family member with external address and 
data bus.

Even if you did have that I rather think it would be dog slow!