Here's a
link to a review of Cubicle Chaos. Does look like a decent Arkanoid knock-off. I'll give it a try once the Axim comes.
And here's a
link to the calculator that Bob mentioned. It is a nice improvement over the base calculator, offering some unit conversions and scientific, statistical, and boolean functions. It does say that it only works on XP and Server 2003, but you might give it a try if you run 2000.