wafflesandwich

I just got accepted (today) to my top choice program with funding for four years. I only applied to three programs -- professors from the other two programs have explained that their funding is incredibly limited and that it is quite unlikely that I will receive funding from them. Also, I am certain that this school is where I want to be and is the best option for my research interests, but have not heard gotten any official news from the other two programs. Should I accept the offer now/soon? Or should I wait for word from the other programs? What is the etiquette for acceptance? Thanks!