Work is well underway on Halcyon Calc v1.4. The primary feature for that revision will be matrix and vector support for both real and complex numbers. Although we cannot predict a release date yet for v1.4, coding is essentially complete and we are actively testing the new release.
As you have come to expect, the interface of Halcyon Calc v1.4 will feature behaviour similar to classic calculators while also taking advantage of the touch interface on the iPhone, iPod Touch and iPad. If you have any suggestions for us, please let us know in the forums.