I think Sun DOES have a product stack that they want to sell you, but I think they also understand that what they have isn't always the best fit. For instance, SunONE App Server is highly dependent on LDAP for its data storage, especially for a cluster. They will tell you, now, we have a good LDAP server and it is priced reasonably, but if you want to use OpenLDAP we aren't tied to anything specific to our LDAP server.
WebSphere, on the other hand, *REQUIRED* DB2 up until the most recent versions to manage data exchange across clusters.
RE: Bigotry
I think Sun DOES have a product stack that they want to sell you, but I think they also understand that what they have isn't always the best fit. For instance, SunONE App Server is highly dependent on LDAP for its data storage, especially for a cluster. They will tell you, now, we have a good LDAP server and it is priced reasonably, but if you want to use OpenLDAP we aren't tied to anything specific to our LDAP server.
WebSphere, on the other hand, *REQUIRED* DB2 up until the most recent versions to manage data exchange across clusters.