Just a quick update, the 10.6.3 update has broken the audio on my d830 using legacySTAC9205.kext. I'm looking for a workaround, removing AppleHDA.kext doesn't seem to do anything, and of course there's no way to get any real debugging output to know why it's not loading. *sigh*

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Dell Latitude D830
CPU Intel C2D T7300,2GHz,4MB,800MHz [+p/c states,DSDT]
RAM 4GB DDR2,PC5300
Graphics Intel x3100 [DSDT]
Audio Sigmatel 9205 [legacySTAC9205]
Wired Broadcom 5711 -64 [AppleBCM5751]
Wireless Broadcom 4311,4328, Flashed Apple IDs
Bluetooth Dell 350
HDD SATA 500GB,16MB [ATA,DSDT]
Display 15.4" UXGA,1920x1200x32,Display Sleep [DSDT]
Halt/Restart Flawless. [OpenHaltRestart]
Sleep Flawless. Power Button,Clamshell [DSDT]
Other Brightness slider, Perfect Energy Saver