xwiki backup / database conversion

[CeDeROM]

hi!

im trying to install xwiki on few enviromnents and then choose one 
that suits best xwiki needs. im using mysql and postgresql databases 
and i have _great_ problem with sensible performance testing because 
 example mysql database provided on xwiki website cannot be 
converted into postgresql. also dump provided for PostgreSQL doesnt 
work with current xwiki release... :(

as there is no backup facility built into xwiki (while it should be 
standard) i cannot use simpliest method of data conversion. i think 
that backup would be very very helpful feature, not only for making 
backups (in xml) but also for transferring xwiki into different 
environments!
maybe developers could look at http://dbunit.sourceforge.net/

can anyone share xwiki database dump both in MySQL and PostgreSQL 
format?

greetings!
tomek