That's good news. Oyster's widely-lauded service offers a great value at $10 per month but it's not available on Android, nor did Oyster have any plans to release an Android app when they launched.
I'm still waiting to get a response from Oyster, but I would bet that they've changed their mind. I think this is a sign that Oyster has noticed the complaints made by blogger after blogger and commenter after commenter after commenter after commenter about the lack of an Android app and realized that they goofed.
Oyster currently offers an iPhone app and is working on an iPad app. The service is not available on any other platform - not even your web browser.