Sorry for the delay in getting this post out to XPS 700 and 710 users who have been waiting for this update.
Yesterday, we posted version 1.4.1 for the XPS 700 and XPS 710. Chris over in the Dell Community Forum posted an update yesterday, and also has a list of links to XP and Vista-specific drivers in this thread. His update also lists the enhancement and fixes the new BIOS provides for both platforms.
Again, XPS 700 users can go here to download this BIOS and XPS 710 customers can go here to get it.