I agree with Michael,
There is nothing wrong with comparing products but advertising your product on a rival forum is in bad taste. I wouldn't do it. However, like Michael I am not the owner of this forum. I don't make the rules here but I would observe the golden rule!
Anyhow, please also keep in mind that as tasty as your hardware specifications may be, few people here will likely bite. That's because we've collectively been burned too many times by folk who claim to have a shiny new device that will run circles around the Arduino platform, only to discover that when the time comes to implement anything complicated (for which we bought those shiny powerful, non-AVR processors) that the software backend simply isn't there. At that point, the hardware becomes a somewhat less-than-useful paperweight. Paul has consistently supported his product and his multi-year history of excellent support, improvement, etc. is precisely why we are all here. The hardware and software have to be seen as a package, and Paul delivers.
Arduino competitors like Digilent, Maple, Galileo, etc. promised a golden pot re: offering a improved Arduino experience, and so far, IMO, PJRC, Ruggeduino, and Digistump are the only manufacturers to have delivered a truly innovative complement to the Arduino universe. Of these, the Teensy series is by far the most technically complex advancement in terms of hardware (i.e. ARM-based, but Arduino-compatible platform months ahead of the Arduino release) as well as software-wise (contributing extensively back to the Arduino universe for issues with malloc(), SPI, etc.)
So, I would suggest a different approach. I wouldn't advertise here. I would put your platform on kickstarter for the world to see, just as Paul did with Teensy 3.
Last but not least, I would consider a different GPRS solution like Sparqee because AT&T will discontinue 2G coverage in the United States in the near future. Sure, you can rely on T-Mobile for a bit longer, but that too will come to an end eventually and meantime the coverage may or may not be satisfactory. 3G modules like the one used on the Sparqee are much more expensive than 2G modules ($8 vs. $65) which is why I'd implement the sparqee as a pin header and let the users who need the connectivity add it on themselves. Plus, you have a lower implementation risk since the sparqee folk allegedly have handled all the really difficult lifting as far as connecting to the internet, depositing data, etc. is concerned.