I helped Gnu_User test the BlackCoin multipool right after Radioactive had his meltdown in IRC.

my advice?

not worth it, not unless there's insane amounts of interest and hashing power.

I'd recommend going with a 3rd party like coinking, if they can set you up for cheaper than what you'd pay to build your own, it'd be worthwhile to gauge interest.

if it takes off, then build your own and move people there, again that's super risky.

The issue with the blackcoin pool was it going down occasionally for upgrades and maintenance. miners don't give 2 flying fucks about features and a better interface.

They care about it working, getting consistent payouts, and never going down.

BlackCoinPool had almost 20 GH scrypt at one point, then they decided to take it down for a few days to apply changes, and it was 5 GH, then people see others leaving, then they leave, it's a downward spiral.

IMO, whatever you guys go with, just make sure that it works and will never go down, multipools can grow and grow and grow, people feed off of every new user coming on, the moment they all get disconnected, it'll never be the same.