According to Linux Journal's Product Insider Adobe has just released yesterday an alpha of their AIR platform for Linux. They've got a free download directly from Adobe's site in English and later this year when they finally launch the product it will also be available in other languages as well.

I do believe this is a very interesting move from Adobe, seeing as how Silverlight seems to really be picking up steam and is less likely that development tools for it will be released from Microsoft directly, though apparently some tools will available from Novell (at last through the use of Mono). At any rate, it is good news to have an integrated development platform for Rich Internet Applications from Adobe.