The top 5 priorities if I had any say, would be:
1. Blockchain explorer (Just adds a more "official" feel to the coin, and some verification)
2. Bitcoin client capabilities. (This is a big one, the ability to send bitcoins from the bitcredit core, basically merging the two, would be incredible for the market)
3. Lightweight client (Kind of following from #2, if you were able to share block directory files then they would both come hand-in-hand)
4. GPU miner (Self explanatory, the more ability we give users to mine, the more mining will occur and more users it will attract. This could be added after an exchange has accepted us, however)
5. Exchanges (Once the above 4 features are implemented, I think it would have proved to everyone how promising this coin is, and dedicated the developer is. An exchange would have a hard time saying no!)
But that's just my 2 cents