If you are interested in getting more information on DSTAR there are many web sites and usergroups that you can explore. A few of the ones I like and are good places to start are;
http://www.dstarinfo.com/home.aspx
http://www.icomcanada.com/index.html
For those who are interested in DSTAR radios other than ICOM Kenwood has released a new tri-band DSTAR radio. See the link bellow for details.
http://www.universal-radio.com/catalog/ht/4074.html