Does it mean that I will download identical arcive after folowing "try alfresco", "by alfresco" and "open source downloar" links?
On "Try Alfresco", there is a free, hosted version of Alfresco for people who don't want to download the system to try it out. In "Buy Alfresco", the model is very similar to JBoss or MySQL where you can buy the support and certified stacks of Alfresco. For those who purchase Alfresco enterprise support, we provide quick maintenance fixes; prioritize answering configuration, deployment and development questions; certify against non-open source systems such as Oracle or commercial portals. The enteprise version also comes with a warranty and indemnity.
Alfresco uses JLAN and it is not free. Is there JLAN in open source download?
The source code for the Alfresco version of JLAN is free and completely open source, but is specific only to Alfresco. As a result, Alfresco supports the Microsoft CIFS protocol, similar to Samba, which provides more metadata than WebDAV, allows for offline synchronization, and works with Microsoft Briefcase. It also supports NFS and FTP.
Java EE 5 has just passed Final Approval Ballot. There are many JSRs under it like JSF 1.2, EJB 3.0 etc. What Alfresco plans related to those technologies?
On JSF, we use the MyFaces 1.1.1 implementation of JSF 1.1, which has not yet addressed JSF 1.2. The recently approved JSF 1.2 implementation helps rationalize the expression languages of JSF and JSP, but will require substantial changes on our part. As soon as MyFaces reaches 1.2, we will start moving to the new spec.
On EJB 3.0, our plan is to provide compatibility as soon as possible, but it is a longer term project to migrate to some of the interfaces specified. We are quite happy with Spring for AOP and Hibernate for O-R mapping.