question about my 20gb PS3

its been a while since i posted but i thought i might bring this up, some people may be in the same situation as me. A month after launch i decided not to spend the extra $20 bucks because i had a hard time finding a PS3 to begin with and the last one the store had left was a 20gb. so i bought the 20gb and was happy with it for a while. UNTIL..... i found that it was a pain to do updates,i am very disappointed with the lack of wi-fi capability. it has just dawned me that they lowered the price of the 60gb to the price of my 20gb. i dont really care about the hardrive space. i do though, care about how i have no wi-fi capability. Does anyone know whether or not sony or any other company has developed a piece for the PS3 so i can gain wi-fi accesibility. And or, if sony is doing something this problem? 

i know, its been a long time since they discountinued the 20gb model im just angry because of the lack of accesibility due to my choice in model.

thanks guys  

ya i thought bout that, maybe ill run into best buy and see what thye have to say, because if i can't find a way, im just gunna see how much the trade in value is and go buy a 60gb ughhh this is such a pain