Simplify the following text for a Grade 15 native English-speaking person.
Original: announced that by ( the Northern Hemisphere ) summer of 2006 they would interoperate using SIP\/SIMPLE which is followed on December 2005 by the AOL and Google strategic partnership deal where Google Talk users would be able to talk with AIM and ICQ users provided they have an identity at AOL .
Simplified: announced that by the 3rd quarter of 2006 they would interoperate using SIP\/SIMPLE , which was followed , in December 2005 , by the AOL and Google strategic partnership deal in which Google Talk users would be able to communicate with AIM and ICQ users provided they have an AIM account .