Very soon more than likely - apparently its been pulled from the marketplace for WP7.5 devices as well - Can only mean they are pushing it through certification to let it loose - would make sense to do it now the phones have been released in the US
My guess is there is a big update coming. They are going to get rid of MSN messenger and combine it into the Skype app for W8/RT, so I would imagine the same capabilities in the WP8 app as well.