Nice site and interesting app. It seems like more of a mockup organization system than a tool for creating mockups (like Balsamiq or Mockingbird), which was my initial thought looking at the name. Perhaps you can interface with them somehow?
I'm not big on the product name though as my first thought was "oh cool mockups" which then turned to "oh wait it's a typo / misspelling of mockups". It's further confusing because you spell "mockups" correctly throughout your site. You also run the risk of a competitor buying mockups.com and building their own mockup software (logical development option).
You've put together a great tool and well designed site, don't sell it short with a typo'ed product name.
I'm not big on the product name though as my first thought was "oh cool mockups" which then turned to "oh wait it's a typo / misspelling of mockups". It's further confusing because you spell "mockups" correctly throughout your site. You also run the risk of a competitor buying mockups.com and building their own mockup software (logical development option).
You've put together a great tool and well designed site, don't sell it short with a typo'ed product name.