Herbert has submitted a link to his blog that talks about using PHP on the Google App Engine including a wrapper class, pQg.

Google is now supporting 2 languages for Google App Engine: Phyton and Java. [...] Currently focusing on how to use 'normal' SQL in PHP scripts at Google App Engine.

Topics covered so far include:

• Sending email with PHP at GAE
• Creating, retrieving, updating & deleting records in PHP @ GAE
• pQg = PHP with SQL on GAE
• How to use pQg