Twitpay has raised an undisclosed amount of angel financing and will launch a service that allows users to order and buy downloadable content, via Twitter.

The Atlanta-based social payments startup, launched four months ago, allows users to make payments of up to $1,000 through the micro-blogging phenomenon that Twitter has morphed into.

Twitpay is part of an eco-system of services and applications that is transforming Twitter from a social media site into a communications — and now an ecommerce — platform.

CEO Michael Ivey was tight-lipped on the details of the fundraise. After some prodding, he ventured to say that seed funding for Internet startups at Twitpay’s stage is generally less than $300,000.

Congratulations to Twitpay, the hottest concept to come out of Atlanta in some time.