Recently i had conversation with Wikimedia developer Ryan Kaldari where he mentioned "We evaluated numerous fonts and Liberation Sans had the highest overall score of all the FOSS sans-serif fonts we evaluated."
There was an issues [1] with positioning of accent marks which we have fixed. After it i believe Wikipedia is also now using Liberation fonts from bug. [2]
For better collaboration for upcoming development of liberation 2, we have now made it available on github. [3] Existing fedorahosted git will be still there but i will mostly use it only for liberation 1.07 and liberation 2.0 development will happen on github and i will just sync fedorahosted git with github periodically.
Regards,
Pravin Satpute