I been using Intel Boards for bulding Media Center PC's for the last 4 years. One of the reasons choosing Intel Media Series Boards Boards was that they supported Dolby Digital Live Technologies. Series 4 (DG45ID-DG45FC-DP45SG), and Series 5 (DH57DD-DH57JG) were compatible with Dolby Digital Live, but none of the 6 Series boards, even if the audio codec might be compatible. Probably it is a matter of Licensing that Intel did want to pay Royalties to Dolby to continiue supporting Dolby Digital Live (Extra Cost to Manufacture).
Concluding i have now changed my preference to Gigabyte Motherboards like H67N-USB3-B3 and Z68MX-UD2H-B3 (for media center pcs) which support Dolby Home Theater v4.0 Technologies.