Type-moon has announced that they will be selling an audio drama called All Around Type-Moon at the coming summer Comic Market. The audio drama will span for 150 mins over 3 CDs featuring all the characters from the Type-moon universe coming together in a cafe.
The works featured in the audio drama are:
1: Kara no kyoukai
3: Kagetsu Tohya
4: Melty Blood
5: Fate/stay night
6: Fate/hollow ataraxia
7: Tobidase! Toraburu hanafuda douchuuki
I guess that means they’ve already casted voice actors for the characters from hollow ataraxia and Fate/Zero.