I did a bit of research and found that three of the companies-- Seraphim Studios, Valkyrie Media Partners, and Sxion 23 --are all registered to the same name. The fourth, AEsir Holdings, is registered to Net Master Hosting. According to ANN, who talked to ADV's Chris Oarr, several former ADV employees are already working at these new companies, so you can presumably expect the releases from these companies to be of the same calibre as ADV's own releases.
The release offered that "further announcements are expected" from each of these companies "over the coming days," so I'm sure we'll hear more about what they're up to soon!
I've never had a problem with their voice-overs or translations either. As a contrary example: Viz's release of Death note has a serious problem in that japanese Kanji or hiragana, etc., that appears on screen isn't translated with subtitles unless you're watching the anime in Japanese, with English subtitles. So if you're watching the English dub, obviously without English subtitles, then it doesn't ranslate what is being written in, for example, the Deathnote. It's not a small problem for Death Note, since the very premise of the series involves the written word! ADV wouldn't have let this happen.
Anyways, it's too bad ADV is gone. i didn't even mention Neon Genesis Evangelion, which ADV brought to the West, which introduced many to anime I'm sure.
The way things are worded, it's just more of shifting things to a Sentai Films style operation- make up new names, and make each division seperate, probably to make it easier to manage things business-wise. It's not surprising, and it's in no way bankruptcy or a shutdown...
Dimension Films, Disney pictures, Disney Home Video, Disney stores... Sony has Sony Records, Sony Pictures, Sony Electronics, they used to have Columbia, Universal and Trystar.... Warner Brothers has Warner Brothers Records, Warner Brothers pictures, AOL, and ul;most every rap label out there, GE has NBC- GM has Chevolet, Pontiac, Cadilac, and had Hummer, ... Toyota Moters has Toyota, Scion, and Infinity, and Bandai has... Crap- Bandai anything under the sun! companies Split themselves into divisions to keep company themes, book keeping, and marketing to the public straight- ever heard of "Mother Company?" Well kid it's very rare that you will purchase something or deal with any company that doesn't have one. Even ADV had multiple companies: Newtype, Anime Network, ADV films...