G4 has made some vague promises of more anime down the line, but it could be a while. The main problem is that the Anime Current block was programmed by Geneon, which has gone kaput.
It's actually very lucky that Black Lagoon: The Second Barrage aired, 'cause those episodes never got released on DVD (though they probably will in the near future).
Anyway, G4 likely has to let their agreement with Geneon expire before they can show more series from other licensors. They had Raxephon available via video-on-demand, so perhaps that could air. Anyway, might not be anything 'til fall, if then ....
Are you watching any other anime at the moment? I'm loving Death Note on YTV ... and it took me forever to realize that one of the main characters was being voiced by Battlestar Galactica's Felix Gaeta himself, Alessandro Juliani.