I found the following waiting for me when I checked in tonight at the Sheraton Ft Lauderdale Airport hotel(BTW: It was posted
at the front desk and a copy was in my room next to the phone)

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Consistent with all Sheraton Hotels in North America, we have changed the pricing structure of our local and 800/888/877 calls.
Please take a moment to review this guide to avoid excessive charges on your account.

Hotels have experienced huge growth in the number of local and 800/877/888 calls due to internet access and e-mail. The lengthy duration of these internet on-line calls will often tie up all of the available phone lines,causing busy signals to other guests trying to use the phone system.

While we still wish to remain "business-friendly" by offering low cost calls and complimentary 800/888/877 calls, we must ensure that adequate telephone service is available to all guests.

To that end, we now charge an additional, $.10 per minute charge for local and 800/888/877 calls that last 60 minutes or longer. Our research has determined that 60 minutes is a reasonable time to access basic internet and e-mail functions; calls that remain under 60 minutes are still free(800/977/888), or charged at local call prices($0.85).

As an example of the higher priceing, an 800 call lasting for 90 minutes would be billed at $3.00(60 minutes free & 30 minutes @ $.10 per minute).

We thank you for familiarizing yourself with this change, and thank you for your continuing patronage of Sheraton and Starwood Hotels and Resorts.

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Note: I copied this verbatim, include the reference to 977 calls, most likely meant to be 877.