I would like to donate more. Regularly, small amounts, to many many projects.
For this, I need a simple list of bitcoin adresses. That's all. Every additional  step is just in the way.

How about a website which lists non-profit donation adresses?

Name - Field of work - Website - BTC Address

To make it manipulationproof, users could verify the entry and vote or flag, or the like.
I would check for new entries from time to time, check on their website if the entry is legit, and, if I like their cause, donate.

The thing about non-profits is that they need members (to have any influence) and a somewhat constant donation income they can calculate with. That 1000$ one-time donation is great, no question. I guess most would, however, prefer a 1$ donation every day for the next three years.

And that's what I want to do. Send small donations to a huge list of charities on a regular basis. Monthly, weekly, whatever. But for this, I, we, need a very simple way to do this. And this starts with a trusted central place to collect donation addresses.

Just an idea I always wanted to see come to life:

1. make charities accept bitcoin over a public address.
2. top all donations toward that particular address with some more bitcoins from our funds, based on the ratio of received donations.

E.g. you have 2 organizations who accept bitcoin donations over addresses 1abc… and 1xyz…
In one month, charity 1abc… receives 6 BTC in donations, charity 1xyz receives 4 BTC in donations.
Out of our funds we donate 1 BTC per month (or some percentage of whatever we have) to all the charities, so 1abc… will receive 0.6 BTC from us and charity 1xyz.. will receive 0.4.

That way, we'd not only incentivize charities to accept bitcoin donations, we would also incentivize them to do so in a very transparent way over a public bitcoin address, which is one of the things I'd like to see from charities anyways. Also, donators would be incentivized to donate bitcoins rather than Euros or Dollars, since that would result in a higher donation from us chipping in.