When booting with 'hwspeak' the hardware related speakup modules are 
autoprobed. Due to lack of the according hardware I can't test it on my own, 
though the code itself seems to work according to my tests.

The speakup.synth=... bootoption is supposed to work as well.

Would be great if someone could test it with the upcoming release candidate of 
grml 2009.05.

thx && regards,
-mika-