So who benefits?  I can see anyone with a Flash site full of data jumping up and down with glee!  But if your Flash application is heavy on data, it is likely to be pulling relevant data on demand from remote back-ends, and if this is the case, Adobe’s new initiative will not be improving SEO for you.  Where it will help is for the more monolithic Flash sites.  Big bang flash sites where all the static content is screaming out to be found by the search engine crawlers.  For those sites, this is a tasty SEO burger.

Javascript is an exteremely powerful language, and for products such as Sproutcore and Silverlight, it is a great thing.  I questioned it in Silverlight initially, but came to love the Javascript support.  Rather than being proprietary, it opens the door to so many more businesses who can not step into the realm of Flash due to lack of skills and toolsets within their delivery teams.  With Silverlight 2 just around the corner, you will be able to take an array of languages that have excellent application building tools, even allowing Ruby could power your applications front and back, with Silverlight as the glue.  These languages have a solid history, experienced developers, MVC frameworks, mature tools, and online communities.

Of course the main place Sproutcore is going to be exciting for Apple, adding ease of development, and more depth to browser applications, is on the iPhone.  In general the current selection of iPhone applications are good.  Not great, not cool, just good.  But writing iPhone applications is cool.  With the cool factor driving development and innovation, Sproutcore applications written for iPhone are likely targets for the Nokias and LGs in the market. 

Could it be that the ultimate mobile combo a Silverlight RIA front end with a Sproutcore MVC driving it in the background?  Only if banner advertising is brought to you by Flash.