As a D-STAR user and advocate I really see no need for a Sticky or Sub-Forum for it here. As it has been said there are numerous D-STAR related forums and web-sites already out there that pretty much covers any and all things D-STAR related.
Other than D-STAR transceivers, the only other receiver that can decode D-STAR transmissions is the ICOM IC-PCR2500, I believe, and with the cost of that you'd come out cheaper by just buying a D-STAR transceiver.
No scanners exist that will decode D-STAR and since this site is more Scanner/Receiver related it just really doesn't make sense to add this Sticky/Sub-Forum. But since I'm not the owner/administrator for this site it really doesn't matter what I, or anyone else for that matter, other than the owner/administrator has to say.