which exchange will add ark?
hopefully all of them
when the mainnet launch today, the ark will be on exchange at the same time ?
yes, the same day.
So when does main net launch?
Btw I still have tokens in my ico account. Is a wallet available?
yes there is a working wallet but for testnet only currently. Mainnet is 21st of March and shortly before then we will update the wallet for mainnet so check back often.