it deals with the limited programming capabilities of the TI-NSpire...
I don't understand why someone like you, who is very envolved in open source project like Mono, can work for a so locked calculator... (I hope it will be modified soon !)
I see the documentation of the NSpire on the TI website but I don't see some features what was part of the classicals TI 68k calcs (TI89 TI92 TI92+ V200). For example I don't see how to plot a surface (in a 3D plot). That was possible with TI92 not with NSpire (for now). I also don't see if it is possible to program on the calculator (using a sort of TI BASIC). I don't see other languages supports (such as ASM and C... like the SDK that was given by TI for FlashApps) So I consider that NSpire is for now just a return behind (behind 68k) Even if the processor is much better... even if the GUI is better too (maybe the best) I consider NSpire as a not finished product... I hope that next release of the OS will solve this... In my mind a very innovative calc will be a calc that could run a little Linux OS and softwares such a Octave, Scilab... Maybe you could say more about NSpire now... for example why "Mono & .Net" tags in this article...