Characters allowed in a Battle.net username, both namespaces.

[SecretShop]

Anyone know what characters are or are not allowed in Battle.net usernames?

[topaz]

Only numbers and letters, periods, underscores, dashes, parenthesis, and brackets are allowed. Other symbols were once in use, but have since been blocked from new registration.

[rabbit]

Also, names must begin with an alphanumeric character AND no two non-alphanumeric characters may be adjacent.