The JA Tabs module I think would be more useful if it had the ability to accept any number of modules without any quality degradation.
Let me explain:
In JA Opal, you can really only have two modules in the JA Tabs position because once the space is overrun it messes up the look of the module.
It would be better if when the space limit for the titles has been exceeded there were arrows on the left/right-hand side of the module that would allow you to move back and forth between the tabs so you could click on them (just like many tabs are handled in Firefox).