We were also one of the beta users for this:
GameLine - Wikipedia, the free encyclopedia
The remnants of which went on to form America Online. I thought it was pretty cool to be able to hook your 2600 up to the phone and play games. Little did I know what that would lead to! 
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Thinkin' of a master plan
'Cuz ain't nuthin' but sweat inside my hand
So I dig into my pocket, all my money is spent
So I dig deeper but still comin' up with lint
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