Discovery Channel and Discovery en Espanol will stage their 1st Spanish-language simulcast Aug 1 with the premiere of "Columbus: Secrets from the Grave." — Oxygen premieres 6-part dark comedy "Nighty Night" from the BBC (Aug 6, 10pm). At 9, the net runs "Snapped," profiling women who murder. — HRTV joins DISH Net’s lineup tomorrow, bumping distribution to 11mln+ HHs. — Lifetime offers an alternative to the Olympics with summer stunt "TV Movie Gold," featuring 7 network movie premieres and 13 other flicks. — C-SPAN has gavel-to-gavel coverage of both conventions for the 20th year. — Virgin Mobile cell users can access Comedy Central original content monthly under a deal between MTV Nets and Virgin. — WE premieres how-to series "Savvy" Aug 5, 10pm, hosted by Tina Malave of Court TV’s "Fake Out."