Apollo is a next generation message queuing solution that recently posted some impressive benchmarks against RabbitMQ, HornetQ, and ActiveMQ. The benchmarks indicate that Apollo will be on a lot of developer's roadmaps for messaging.
VMware is adding support for PostgreSQL to CloudFoundry, it's open source PAAS solution.
Paul Fremantle announced on his blog a new open source projet and product: WSO2 Message Broker. MB is based on the Apache Qpid and supports Amazon SQS APIs and WS-Eventing.
While VMWare offering a new range of products to support its vision of enterprise cloud computing at VMWorld 2010 is interesting from an operations and user perspective, developer focus is on vFabric the Spring platform for developing and running cloud based applications. The goal is to provide the same convenience infrastructure for cloud applications as for spring based enterprise applications.
OpenCredo Ltd has announced support for talking to Advanced Message Queuing Protocol (AMQP) based messagng servers from Spring Integration, a lightweight ESB-like messaging framework. The new support brings MOM vendors whose product doesn't support JMS to users of the Spring Integration framework. Some Message Queues, like RabbitMQ, are very scalable and don't support JMS.