I can't make that information public, because it would increase the network hashrate of that currency, increasing the difficulty and orphans, lowering our profits. But rest assured that my profitability calculator is advanced, accurate, and up to date.
I can't make that information public either. But I consistently check the profitability of coins that are put on exchanges. So the basic answer is "the most profitable ones".
Payouts happen once a day at 2:30 AM UTC. If your balance is above 0.01 BTC or if your balance is above 0.001 and it's been 7 days since your last payout then you will get paid.
This is your balance of coins other than bitcoins. My auto-exchanger will convert them into bitcoins, usually within a day.
This is your balance obtained from blocks that have not yet reached maturity, and are therefore possible orphans. After a designated number of blocks, you will be credited these coins, and they will go under your "unexchanged balance" column. Some coins take longer than others to mature. For example, NovaCoin takes three days.
I have four exchanges automated, and I occasionally manually trade at a couple others.
No. The difficulty is static at 512. This reduces my server load.
No. The only downside is that it increases your very short-term variance since you'll only find a share every minute or so on a 1 MH/s rig. There is misinformation on the bitcoin forum stating that a high difficulty reduces your profit if you have a slow GPU. This is untrue. It has no influence on your profit.
Yeah, give me a message on bitcointalk, or email me.
#middlecoin on FreeNode.
www.middlecoin.com/json. www.middlecoin.com/reports/ADDRESS.json for individual payout reports, and possibly individual hashrate stats in the future. The variable totalMegahashesPerSecond is misleading, and actually represents the accepted hashrate, not the total.
About every 5-10 minutes. It can get much longer sometimes, when the database server is under stress. The json API is updated at the same time as the webpage.
Don't use --no-submit-stale. Stale shares caused by coin switches are actually paid.
People have made third party websites to help. Here is a list of some: