Experiences on free and low-cost hosting for play framework applications?

I'd like to know your experience finding a host for play applications on free or low-cost servers

So far now I found the following options:

• Playapps (discontinued)

  A cloud hosting solution by zenexity, the company behind play framework
  module: http://www.playframework.org/modules/playapps-1.4/home
  princing: http://www.playapps.net/pricing

• Google Application Engine

  module: http://www.playframework.org/modules/gae-1.4/home
  cons: can't use mysql, should not use JPA
  Instead of JPA it is advised to use siena
  http://www.playframework.org/modules/siena-2.0.0/home

  nice example: http://viralpatel.net/blogs/2011/01/first-play-framework-gae-siena-application-tutorial-example.html

• Cloudbees

  module: http://www.playframework.org/modules/cloudbees
  floss: http://www.cloudbees.com/foss/
  tutorial: http://wiki.cloudbees.com/bin/view/RUN/Playframework

• dotCloud

  module: http://www.playframework.org/modules/cloudbees
  princing: https://www.dotcloud.com/pricing/
  (there's a free plan with 10MB db)

• AWS - Amazon Web Services

  pricing: http://aws.amazon.com/en/ec2/#pricing
  pricing: http://aws.amazon.com/en/elasticbeanstalk/#pricing
  samples:
  http://www.ibm.com/developerworks/java/library/j-javadev2-19/index.html
  http://www.ibm.com/developerworks/java/library/j-javadev2-16/index.html

• Heroku for play!

  princing: http://blog.heroku.com/archives/2011/8/29/play/
  (seems like you get 1 web dyno + 5mb postresql dabate for free)
  sample: http://devcenter.heroku.com/articles/play

Do you have any experience with one of these?

Any other option you know?