One interesting thing about this - as a Slingshot customer, if I go into my account page, there doesn't seem to be any way to change to the gig plan (I'm currently on 100/20 unlimited data with phone line for ~$95). But, if I go to the website as a new customer and look at the available services, the gigantic plan is there - for $105, I could get my current package at the unlimited speed.
I'm not sure if this is a website glitch or a deliberate policy - any Slingshot rep care to comment?