I suggest you look at the HCS08 family for a similar device. The BDM debugger built into the S08 family is much better than the HC08 MON08 debug.
I recently bought a HCS08 debugger from Witztronics ($49), and it works great. It works with the FREE special edition of CodeWarrior from Freescale, so working with any processor with <16K of flash is almost free.
uCTechnoGeek