SitePAD
SitePAD is aimed at those people who record information i.e. survey, who untill now have had to use pen and paper, then make their way back to the office where they set about RE-DRAWING their sketches on their desktop CAD app. It is also useful to people for whom a full blown desktop solution is not cost effective.
The iPhone/iTouch/iPad + SitePAD combination allows them to record that information in a CAD format while on site.
Yes the screen size is small, but the drawing canvass is pretty much infinite and using pan and zoom the user is able to take advantage of that. By drawing in the CAD format from the outset, there are many advantages. Primarily, no time is wasted re-drawing anything. Using the cellular networks, the files can be sent to the office in real time for a colleague to continue working on. Indeed, no additional time is wasted in that colleague trying to interpret someones hand drawn sketches.
The screen is small, but the software will work on the iPad (theres a native version coming soon). SitePAD isnt trying to replace desktop CAD applications, but it does extend your office / CAD capabilities, allowing simple CAD drawing remotely.