So the hot thing in BlackBerry right now is the new Twitter client from RIM. But you still need an invite, right? Well we have got just 4 codes left to hand out. All you have to do is leave a comment below. And it might not hurt if you are following @BlackberryOS either. I'm going to pass these codes out sometime tonight. So hurry and comment. I will PM the winners with their invite codes. Good luck!