How to learn WebMethods?

Hello All,

I started thinking of learning Webmethods, but do not have any clue on that except that it is an EAI implementation. I have around 4 years of experience in Java/J2EE but not really on websevices or EAI side. But want to pursue my career towards SOA and EAI and hence looking towards Webmethods. I tried to google some study/learning material on webmethods, but could not get any.

Can some one show me few pointers for learning/Using the Webmethods? Also, is this software to be purchased or any trial/community editions available for this.

Please advice.