I discovered through the tumblr of the lovely Berselium that the Healing Stone CD's are available on iTunes. The USA iTunes store has them, and at least the Dutch one (where I have an account) has them too, so hopefully they are available globally. Search for "yumoriseki" or simply "yumori" and you should be able to find them.
They have been available for quite some time judging by the iTunes release date, but I though it was worth a mention. As of yet these are the only drama CD's I know on iTunes. If anyone knows any others, please let me know.
Momo & Grapes their Lovers Only series continues. LOVERS ONLY２／ラブストーリーは君と (Lovers Only 2 / My love story is with you) will be voiced by Toriumi Kousuke and is planned for a 2012.04.26 release.
The story takes a whole different route than the more realistic last one. This time it is a story about the love between an angel and a human girl. The angels is sent to earth as a sort of cupid, but falls in love with a human girl. The official site describes it as the "sweet and painful story of the love and farewell between an angel and a human" so it looks like the story isn't going to end well. Now... I need to get my hands on the first CD...
official Cineria Blog, and I have to say it looks quite scary. A link on the front page of the official site already links to their Kareshi Igai page, but so far vol.3 hasn't been added yet. I expect it will be soon though.
Flowershop he Youkoso
Just yesterday the official site for Flowershop he Youkoso (welcome to the flowershop) opened. We've got some visuals, a list of seiyuu, and a release date, but no info on the plot yet. As for the seiyuu, Yusa Kouji, Suwabe Junichi, Ishida Akira, Kobatashi Kiyoshi, and Eguchi Takuya are listed. Animate offers some info on the story; it is a comedy drama that centres on a certain flower shop, and the pretty guys that work at/often frequent the shop. Also, I am so stealing their background for future use.
Sasayaki Micchaku CD
Miracle TrainAoyama-Ichome, voiced by Fukuyama Jun is planned for a 2012.04.13 release. I have no idea what these CD's are like, but this is so absurd and amusing I need to get my hands on it. The CD is a limited edition though, orders are open until 2012.04.13.