In addition to the above links there's also Jalimo.

Unfortunately, unless it's possible to right first-class apps with these JREs, they're destined to be niche things rather than mainstream app platforms. Personally, I think it's a shame.

I asked Peter about it at Nokia World; the answer is simple: "Other platforms" [Android, webOS and iPhone] have one development platform. Nokia have two which are strategic - Web Runtime and Qt. That's already more complicated than the other platforms both in terms of introducing developers to the platform and maintenance/support.