Welcome to the Audial DIY area.
Audial is currently offering three DIY projects, available as kits and occasionally as unpopulated PCBs. All of these emerged from Pedja Rogic's DIY projects, published in 2003 and afterwards.
The one is the AYA II D/A converter. This DIY AYA II DAC is the same AYA II DAC sold by Audial as completed device. Three kits are regularly available, and PCBs are available occasionally.
Another one is the Module Module LAB, versatile line level stage, and which can be used either as a buffer or as a stage with gain up to 20, or as an I/V converter. Dedicated Module LAB page is here.
And third is the Module R, which is a voltage regulator for power amplifiers. To learn more on this item, please visit the Module R page.
Please also note that, as of June 2008, Audial will provide support for DIY items also via dedicated area of DIYHiFi.org forum.
http://www.diyhifi.org/forums/viewforum.php?f=35