Placebo, yes there will eventually be new t-shirts that will have this logo on them. What the t-shirts will say has not yet been decided on... but chances are the logo will either appear on the sleeve or on the chest area. And the t-shirts will most likely be either black or dark grey colored.
Whenever I have news about them, I will post it up on the site. Right now I'm working on finishing I-Mockery's Club Pack #2 which is going to be a big deal, because it's something I've always wanted to be able to do. You'll see why soon enough.