This is huge. Google has enabled a Java scripting application across it's online Apps suite. Previously available only to premier subscribers, the scripting capability is now open to anyone with a standard account as well. This competes directly with Microsoft's cross-Office VBA, allowing users to build their own applications while using the productivity suite as a front end. It's a very impressive and bold move to allow it over the web - and further solidifies Google's "the web is the OS" mantra.
Read more at the official Google Enterprise blog.