There's been a surge in platform-as-a-service providers in the past year, but many of them remain in private beta. Today one more is open to the public: DotCloud.

DotCloud supports PHP, Ruby, Python, Perl, Java, Node.JS, MySQL, Redis, RabbitMQ, Solr, MongoDB and PostgreSQL. Like many other PaaSes, it runs on Amazon Web Services.

Last month DotCloud bought DuoStack, a similar multi-platform PaaS.

As part of the move to general availability, DotCloud also announced the following new features to improve resilience during AWS outages. According to it announcement:

• High Availability: Applications built on DotCloud can automatically span multiple availability zones and datacenters, seamlessly distributing traffic between locations and providing automatic failover.
• Dynamic scaling: As traffic to a stack or database increases, DotCloud makes it incredibly easy to allocate additional resources to ensure it can effectively handle the load.

DotCloud detailed its response to the AWS outage in a blog entry.