You want to financially support Arch Linux but noticed that the Donate page no longer has a way to accept donations? Well, have you bought any Arch Scwhag lately? That is probably the best way to throw money at the Arch project, while getting some cool stuff and advertising your Arch love, all at the same time.
I bought a very nice t-shirt and coffee mug a few months ago, and am ordering some pens today. The t-shirt looks real nice and is big enough for my daughter to wear as a nightgown!