Verizon Wireless is moving right along with its integration of Alltel. As of yesterday, January 16th, Verizon Wireless customers can now call and text message certain Alltel customers for free as part of Verizon’s IN Calling and IN Messaging. To find out if the Alltel number is supported, Verizon customers can go to Verizon’s new Mobile to Mobile web page. Unfortunately, Alltel customers will continue to be billed according to their current plan for calls placed to Verizon customers until the two companies have merged operations. Starting February 15th, Verizon will also drop the “IN” moniker and rename the service as Mobile to Mobile calling and Mobile to Mobile messaging. Say goodbye to all those catchy “IN” slogans!