[ QUOTE ]
Weblogic is a must to have to go to 9.1.x.
-->You need a Java Application Server (Weblogic or WebSphere).
If it is must, what version (Standard/Enterprise) do we have to have? do you know if this would cost a lot of money?
-->For WebLogic you can go with Standard Edition (cluster is not supported), for WebSphere express Edition is supported too. The Red Stack include WLS Standard Edition with no additional cost. Migration from XE requires to buy the tech stack (not a lot of money).
Also what is involved (cost/hardware/software) in installing one view reporting.
-->You need to install the BIServer (aka BI Publisher, aka Oracle BI BIP component). It's a JEE application running on a WLS instance (may be on the same Java server for JDE). The software is included in JDE (no additional cost). You need to pay only if you want to use the stanard OVR report).
[/ QUOTE ]
This response is a good example of why you should always talk to your Oracle account rep. Some of this information is not accurate. I know he means well, but bad advice is bad advice.
For instance, there is a "One View Foundation" license to use One View - it's not something you *only* have to license if you want to run the "shipped reports." Don't just take my word for it. Review the Oracle license documentation and talk to your account rep.
See page 3:
http://www.oracle.com/us/corporate/pricing/jd-edwards-price-list-070607.pdf
There's also limitations on how you can use the BI Publisher license that is shipped with EnterpriseOne.
See page 13:
http://www.oracle.com/us/corporate/pricing/application-licensing-table-070571.pdf
These documents and others can be accessed from here:
http://www.oracle.com/us/corporate/pricing/price-lists/index.html