100
Arch Linux Now Believes Malware Incident Under Control: More Than 1,500 Affected Packages
(www.phoronix.com)
This is a most excellent place for technology news and articles.
What to do if I found a package I installed to be in that list? libgdata to be specific?
Have a check if you updated it recently (PKGBUILD history, about June 10-12). If not you're fine.
If:
(reference)
Personally I would reset everything if I got anything, to kill both any infection and my paranoia. Then reset credentials.
Was it installed from the aur? If not, you're fine