I've heard that there is an improvement for VC with SAP NW CE 7.1.
The Visual Composer can be run locally in Eclipse and it is not required any more
connect to a server to model a UI or Portal content.
What does this mean <b>exactly</b>?
How can I realise this? With an Eclipse-Plugin?
I think you might be referring to a flex builder plugin for NWDS, using which you can design good internet applications on flex/flash that can connect to an SAP system.
If I'm right, you might want to check How to build a flex application without VC thread where theres a LOT of information on this.
Hope this helps.