DEV, when you can enter the exchange?
Are you asking because you operate an exchange or want to see this coin on one of the major exchanges?
Usually it's not the dev responsibility, but rather the specific exchange operators who want to add the coin to their exchange.
Exchange operators will add coins to their site if there are a lot of requests for that coin (They'll want to capitalize on the coin market. the bigger the better)
So, tweet away to your preferred exchange about SignatureCoin.
P.S
I know I'm coming off a bit as Captain obvious to some of you ppl. but there are a lot of new guys over here and I thought I can clear that out.
That's right! We appear currently over 800 signatures in bitcointalk. This is important number, i don't think any other crypto currency advertised this much from signature spaces, we are the first in this kind. We are in the corner stone, and we can develop future great products you can see how easy it was to develop anonymous technology crypto for us.