As far as business expenses, you’re ass-u-me-ing that credit card statements translate nicely and immediately into deductions. Generally, there’s a bunch of math that needs to be done.
i.e., one order for two different clients, taxable in different counties. Or an order that I was charged tax on vs one where no tax was charged since it came from out of state — therefore I’ll owe tax.
I use Flickr and Facebook as well. For things that I actually wish to have public, not anything else.