Since we're making one more revision, and in response to Batari's need for more memory for Superbug, we looked into supporting more than 128KB of cart SRAM and it now looks like we should be able to accomodate chips all the way up to 512K. This should help future-proof the design a little bit although I'm not sure we'll ship the cart with anything over 128KB. It really depends on all your feedback. For Chimera Native games, that much memory isn't really that important as you can bring in more from flash memory on demand. It's just to be able to run the few demos that are out there, or Superbug down the road. Otherwise I think 128K is a good sweet-spot on the price-curve. 256K would be okay if you are all willing to pay an extra .50c or so per cartridge. There may be a few different levels of Chimera available or I might let people decide on a per-order basis which components you want. However, I would prefer to set a fixed platform standard on the standalones. Being able to scale the cart down is more designed for the embedded version where there would be less of a rationale to put anything more on them than the preloaded game requires.