It’s been rumored for a while now, but the best evidence so far of an Android version of the popular iPhone photo app Instagram showed up over the weekend at SXSW in Austin, Texas.

The Washington Post has a good post on the story. At a conference on Sunday, Instagram’s CEO Kevin Systrom flashed a beta version of Instagram for Android running on a Galaxy Nexus.

“…it’s one of the most amazing Android apps you’ll ever see,” Systrom said “in some ways, it’s better than our iPhone app.”

What???!!! Although he wasn’t specific, I would hope that any applicable improvements to Instagram, such as improved speed or stability, would also be ported over to the iOS version for parity.

Systrom says that the Android version of the app is coming soon.

He also added that Instagram now has over 27 million users — almost double the 15 million users announced in December 2011.

The original story has more. Click to read the entire post, “SXSW 2012: Instagram’s Android app prototype makes appearance” on The Washington Post website.