I think they are fine as they are but I want to propose a rename to something based on "MediaWiki". Renaming doesn't affect the current followers at all, so I don't think it's a big deal for them. Just a matter of naming consistency.
Topic on Talk:Social media
About the bot driven @wikimediatech
Ok, if @wikimediatech is only distributing updates about http://wikitech.wikimedia.org/ then Chad is right and let's just leave the username as it is.
Still, can the description be perhaps improved?
"Wikimedia Tech Team" (identi.ca) or "Wikimedia Tech Staff" (Twitter) can be confused by outsiders as a place to know about all tech related activities. I wonder how many of the 80 / 535 followers (our highest numbers in any tech related account) fell in this confusion.
What about something more descriptive?
"Wikimedia technical infrastructure updates."
Pointing to the MediaWiki account from the description would be also useful.
Werdna owns it.