The amount of duplicated code that it introduces in every protocol is what 
makes me nervous. Something I spotted:

- validateData in Kopete"s ediitaccountwidget is pure virtual
- it is reimplemented by protocols, same with validatePassword

What I suggest:
- rename validateData to validateProtocolData (or just validateData), as 
virtual
make some method in the editaccountwidget (validateData or something else?) 
non virtual, put the duplicated account code there, and call the virtuals 
validateProtocolData (or validateData if it is the name) and validatePassword 
as decorator methods.

Duncan
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