Google App Engine: JPA or Objectify?

In practice, the biggest difference after abandoning JDO/JPA is that you will stop screaming loudly at your computer, annoying your coworkers.

Jeff Schnitzer

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Java on Google App Engine

Finally Google adds Java to its cloud.
Free hosting for small consumers.
Free usage for

• 6.5 hours of CPU time /day
• 1 gigabyte data transfers / day
• 1 gigabyte storage
• 2000 mail recipients

Above that the service is paying.

I signed up today. They are using a mobile phone based verification.

The application registration is a bit broken: names that are indicated as free when you enter them in the form, are not available when you register the application( Issue 1038).