On the Thailand immigration website, it says that immigration services are suspended at the main office because of the protests:
Due to the demonstrations, Immigration services provided at Government Complex Center are suspended
It looks like they set up some temporary offices in the meantime though:
Our temporary offices are :
Immigration Service Center for 3 national Legalized Labors, Major Hollywood Suksawat, 1st Floor, Suksawat Road, Ratburana, Bangkok. Click here to view a map
Immigration Service Center for 3 national Legalized Labors, Imperial World Ladprao, 5th Floor, Ladprao Road, Wang Tong Lang, Bangkok. Click here to view a map
This temporary service will be started from January 13rd, 2014 until the situation improves. We apologise for inconvenience. Service time Mon-Fri 10:30 - 18:30 Closed on OFFICIAL HOLIDAYS
The temporary offices probably are "officially" handling visa extensions, but I wonder if the relocation is causing enough disruption/delay that it would be a waste of my time to try to get my VoA extended.
Is it still possible to get a visa on arrival extended at one of the temporary immigration offices? How much longer does it take than it used to at the central office?