hey guys.... i have been checking the phone carefully in the last few days.... and sadly yes i do also have some hairline cracks on the ringer and also by the docking area.... its a shame to see it on it but since mine is black iphone and is very hard to see unless you put it in the right lighting angle... and does not effect the function of the phone.. so not gonna do anything just yet.. until it gets worse... 
ive been reading on apple webiste forum.. and on there people suggest that you call apple care direct... to let them know of the problem and then go from there... 
so if this was to get any worse... i will be doing just that..... 

but so sad to see on a new phone you have waited for so long... and now have cracks! :(