As always, thank you so much!  燕子 and wells1999. 
Regarding to two years EAD, here is what I found, it may clear some concerns for people like me.
http://www.uscis.gov/portal/site/uscis/menuitem.5af9bb95919f35e66f614176543f6d1a/?vgnextoid=62ae15d3ffd7a110VgnVCM1000004718190aRCRD&vgnextchannel=68439c7755cb9010VgnVCM10000045f3d6a1RCRD
回复:回复:请教皮匠和863211,燕子等前辈 EAD renew quesions, Please help!
所有跟帖:
                    •                    
                    回复:回复:回复:请教皮匠和863211,燕子等前辈 EAD renew quesions, Please help!
                     -applebug- 
                    ♂                    
                        
                    
                                                            
                    
                    
                                        
                        (675 bytes)
                        ()
                        01/08/2010 postreply
                                                13:55:37
                    
                    
                    •                    
                    我个人觉得,不用为一年还是两年而操心。即使延一年,那以后
                     -wells1999- 
                    ♀                    
                        
                    
                                                            
                    
                    
                                        
                        (100 bytes)
                        ()
                        01/08/2010 postreply
                                                14:43:48