converting all the mp3/wma to ogg
one easy way is with pacpl

Download the source code from sourceforge download page

$wget http://dfn.dl.sourceforge.net/sourceforge/pacpl/pacpl-4.0.1.tar.bz2
$tar -jxvf pacpl-4.0.1.tar.bz2

and install the prerequisites with

$sudo apt-get install libvorbis-dev libflac-dev lame toolame

then start the cpan perl modules install and watch for any errors

$cd pacpl-4.0.1/extra
sudo ./mod-install.sh
then run the configure script

$cd ..
$./configure
$make
$make install

If any modules you forgot you can read the README and install the perl ones from cpan

If all is ok then you can convert all the files from amarok/konq or from comand line
$pacpl --help
usage: pacpl --to [file(s)/directory(s)]

in my case
$pacpl --to ogg -r /home/mariuz/Various