Nice site there eschmenk... Is that your site?
No. But thanks for thinking I would know how to do something like that.

But be careful about trusting sites like that too much. There is a lot of information that they gather and it would be a lot of work to keep it all updated, so some information is wrong. It's not unusual for them to miss reward halvings and things like that. At least cryptocoinsinfo.com does better than WhatMine.com. (For example, WhatMine.com currently says, "Zeitcoin (ZEIT) Reward: 100'000.00" Wrong! Reward: 1.00! But who cares about a few zeros? They mean "nothing", anyway.

But seriously, they missed a halving to 50,000, then then end of POW rewards!) Even CoinWarz missed at least one wallet update and was reporting the wrong diff on at least one coin this weekend.
I would suggest to Hostmaster (but I probably don't need to) that he keeps this in mind regarding his pool. If he includes too many coins, it would be a lot of work keeping all of the wallets and information that goes into the calculations up to date. If his pool automatically mines a coin because Hostmaster didn't notice that a reward halved, people would be a bit annoyed, I think.