I'd like to propose a DAC forked from Protoshares.
It's main differences will be lessons learnt from Proto and benefitting greatly from the developments made so far.
1) Higher starting Difficulty
2) More reactive difficulty adjustment code
3) Set rewards per Block
4) (Not sure yet) Proof of Stake
5) Target block times adjusted by demand
5 minute Block time
Cap of 100 million PoW
Difficulty adjustment every 100 blocks
100 coins per block initial, 50 then 25 until chain is exhausted.
POS (conditional) 0,03% per day ~ 100% per annum.
Starting difficulty will be current Protoshare difficulty @ that time.
I will be consulting with bytemaster if he is agreeable, if all goes well we can have all basic infrastructure in place before launch. IT WILL BE LAUNCHED HERE, not on Bitcointalk.org.
As for uses, i'm open to ideas, myself truth be told, i'd like it to be a speculative commodity.