I encountered a blog posting on the Adobe typography weblog on the phasing out of Type 1 fonts which recently got updated (October 2007) with some new statistics on the sale of Adobe's Type 1 fonts. Approximately 85%-90% of their current sales is in OpenType fonts.

If you're in the professional design business this means that if you still buy Type 1 you should start to see the writing on the wall. Not to mention that in order to support more and more scripts' features world-wide OpenType is kept updated, whereas Type 1 is dead functionality-wise.