It probably wasn't the most consequential update of the day, but we did get one big question answered from the iPhone SDK event in February: why the iPhone's calculator icon got changed from round buttons to square ones. Apple apparently had a lot of requests for a scientific version of the calculator, and so in iPhone 2.0, you'll be able to rotate the calc to landscape mode for a sci calc, including squares and square roots, sin, cos, and tan, factorials, and everything else you use to use the old TI-85 for back in the lab.

As we noted, probably not a huge sales point for people planning to pick up a new iPhone (which, at $199 for the 8gb, is pretty much everybody), but the added functionality will be a nice bonus for those of us require a calculator for every little bit of math that needs doing.