[UPDATE]The downs of OpColtan resumed:

All  this firms are involved directly or indirectly in nature devastation, slavery and war in Congo, so their sites deserves to stay down!

sonymobile.com
Down from approximately 4:12 PM - 30 May to 9:30 PM - 30 May and more other times during the night protest.

htcdev.com
Down from  approximately 5:11 PM - 31 May to 7:40 PM  31 May and more other times during night protest.

nokiasiemens.com

Down from approximately 2:10 PM to 1 Jun to 4:56 PM - 1 Jun 

motorolacareers.com  
Down from approximately 2:56 PM to 1 Jun to 4:49 PM - 1 Jun

cabot-corp.com 
Down from approximately 5:49 PM to 1 Jun 7:49 AM - 1 Jun
 

omgi.com

Down from approximately 3:07 AM to 2 Jun to 4:12 AM - 2 Jun 

forrestgroup.com 

Down from approximately 4:12 AM - 2 Jun to 7:40 AM  2 Jun and more other times during night protest.

And the protest goes on...

hcstrack.com

Down from approximately 1:18 PM - 3 Jun to right now

lgericsson.com
Down from approximaly 2.00 PM - 3 Jun to right now

 bayerus.com  
Down from approximaly 5:00 PM - 4 Jun - 2 hours