Dollar a Day
I _love_ the idea of getting a daily email that tells you about a worthy nonprofit that you might not otherwise hear about, and this system makes it dead-simple to make micro-donations to each charity.However, I _hate_ the idea of donating to a black box.  True, Dollar a Day publishes its criteria for selecting nonprofits, but those criteria are highly subjective.  And, according to the FAQ, there's no way to opt out of donating to a particular featured nonprofit that you don't want to support.  Heck, even if you cancel your monthly "subscription," your money will still go to all of the nonprofits that are in the queue for the rest of the month.I understand the organization's decision to make things simple to start out, but I hope that it soon offers a way to opt out on a charity-by-charity basis (it could be as simple as a link in the daily email), and pro-rated refunds so that if you decide to stop donating on Day 1 of the month, you're not on the hook for days 2-30.