Regarding time to release new CPU-only coin, IMHO it's better to wait for the release of Primecoin GPU miner. Also may be someone will write another miner for Quark (Quark is performing quite well on the exchange, there is still time to profit), or my own miner will be released. Right now CPU hashrate reallocations between Quark, Primecoin and SecureCoin performed by VPS farms owners could kill young coin. Of course, it's only my opinion and just another thing, may be not so important, for coin creator to consider.
EDIT:
Thanks for the input. I am carefully watching the current state of affairs for the best launch time. This is very clearly not it.