Created by one of the co-founders of Mastercard, Cashets.com is a website that allows the payment of dollar amounts ranging from $0.02 to $5.00. There is a 1% fee (billed to the recipient) rounded up to the penny. You can put money in your account from any PayPal or Yahoo! PayDirect account.
At first glance, the system doesn’t seem to be secure enough to use for payments for electronic access to a specific resource. There is a “Marketplace” that provides links to a few items being sold using the system and I was able to easily obtain those items without paying for them. However, to simply pay someone money or to make a small donation, the system is easy to use, and seems (at least from the outside) to be safe for that sort of thing.
It does, however, make me realize how very easy it would be to create a secure, easy to use system like this. One that supported micro (and macro) payments easily, and effortlessly for both payees and those making payments.