The Verium wallet will be released after the ICO, the exact date is not yet determined but not long after after ICO ends. To partake in ICO you need the current VeriCoin wallet available now at http://www.vericoin.info/ to generate a Verium public and private key pair for import into the released Verium wallet. There will be a walk through on those steps as we get closer to ICO but you can export and generate this key pair very easily in the current wallet 1.6.5 via the file menu export private key option. Verium and VeriCoin keys are the same format.