Army Times has an article discussing funding for ongoing modernization programs of several programs, including the Stryker. (The story has info about improvements to the Bradley and information about the Future Combat Systems program.)

Among the variants to the Stryker is a prototype built with a trailer and crane to recover damaged vehicles -- even if a Stryker is "catastrophically destroyed." Another plan the Army wants full funding for is a nuclear, chemical and biological reconnaissance variant. And one upgrade apparently already being implemented is a Stryker with “an armor kit along the lower sides of the vehicles designed to stop deadly shaped charges such as explosively formed penetrates.”

“The Stryker modernization program will allow you to put more weight on the system. There is a hull protection kit, an armor package, that is being put on selective Strykers right now. It is on the lower part of the side. EFPs impact around the tire area,” the newspaper quotes U.S. Army Col. Christopher Lockhart, the capabilities manager for the Stryker for U.S. Army Training and Doctrine Command.