High Scalability Building bigger, faster, more reliable websites.

What is the future of EJB3 in the industry , given the current trends ?
There are a lot of arguments regarding EJB3 being heavy weighted .....
Also, what could be the alternatives of EJB3 ?
How about the scalability, persistence, performance and other factors ?

There is a lot of information in the blogosphere describing the architecture of many popular sites, such as Google, Amazon, eBay, LinkedIn, TypePad, WikiPedia and others.

I've summarized this issue in a blog post here

I would really appreciate your opinion on this matter.