According to a post on ToonZone, voice actress Tara Platt spilled on her website that Buso Renkin was going to air on Adult Swim (she voices Tokiko in the show), only to have the info taken down shortly thereafter.

The forum poster speculates on whether it will actually appear on Adult Swim, or if it might not be on Toonami instead, or if it’s happening at all. (They also chat a bit about what the deal is with Media Blasters’ Geneon license rescue Seirei no Moribito, which was announced for [as] but still hasn’t been scheduled). Anyway, I didn’t remember hearing about Buso Renkin on the network (and don’t see any other news on it), so I thought I’d let you know what the rumor mill is up to. Feel free to commence speculating!