I fixed some bugs and I'm about finished updating my nicehash bot.  It should keep the average blocktime between 1 min and 60 mins.  It will keep the difficulty from dipping so much like you mentioned one day ago and also during longer blocktimes keep the network hashrate from going too low. I think this solution is going to work really well (even better than changing the difficulty algorithm) but I'll keep an eye on it for a while longer before I release the code on github.

Thanks for mining BipCoin!