Well, I'm a developer and the fact that you have no inclination to make Atlas truly cross-browser is extremely disappointing. Opera may have a low market share, but that market total is huge - billions of people. For instance, on day of release Opera 9 had well over 750,000 downloads (in just one day), with many more still continuing. There are literally millions of people who use it.
Even if the percentage of users is small, why alienate those? What possible business sense is there in disenfranchising millions of potential users?
I develop websites for clients who want to maximise their reach to customers and alienating even just 1 or 2 percent of users can result in significant sales loss. As a developer I simply cannot afford to creates sites that don't always work for everyone. How do I explain to a customer when they get complaints about the site not working in their browser? Do I tell them those potential customers don't matter? What kind of ethic is that to promote?
There is also a myth that Opera is somehow backward and not compatible. This is simply not true. For instance, Opera actually has the best support for web standards of ANY browser - it is the only browser to currently meet the
Acid 2 test. Opera supports AJAX fine - if Google maps can work and other AJAX libraries work then there is no excuse for Atlas not working.
Microsoft have made great steps forward with ASP .NET 2.0 in having proper cross-browser support that meets recognised standards. So why go backward with ATLAS to the "bad old days" when Microsoft had such a bad reputation for ignoring web standards and promoting, instead, it's own closed-minded proprietorial view of the Web? So, please, continue the good work and keep supporting all browsers so that developers like myself can continue to have faith in you.