I got an account on ShellDwellers.com and I've been poking around there. Many people do use dither fish in there set ups without a problem and many don't. I'll keep researching. I already have the calvus so this is already not a species tank. Since the multis are shy my calvus have been even shyer.
I'm still going to give them some more time. I might even wait until my club's March auction. There were a lot of tetras and danios selling for CHEAP the last auction I went to. As of now I'm not going to do anything rash, it does bug me to think it won't be a Tang only tank. I guess I just didn't realize these guys were so shy and skittish.