Very nice!
tried it on my N900 and it looks like this is the calculator I will use most on it.

so far, this is the only calculator I know that has buttons in a size that I can easily press with my fingers (unlike "Almost TI85") but still has on very important button for me - the number Pi!

I need to calculate the area of a circle quite often, so this is great!

btw. (out of curiosity): how accurate (how many digits) does this calculator work in its calculations?