I checked my status online from the USCIS website and it was post decision activity but it is written that the USCIS have approved my case on Febrary 25 2010. at the same time the USCIS sent a letter to my husband how lives in Michigan in US to inform him that my case is approved. so what will happen after that? how long will I wait to receive the next step? what should I do? what post decision activity means?