Perhaps it is not worth having MCI for the long run but certainly bouncing between Sprint and MCI to put big bonuses into your mileage accounts as well as those in your family is worth it.
After I collect all my month bonuses, I plan to switch to Cable & Wireless (this is my internet provider -- www.cwix.com) which will charge only .07 per minute weekdays and .05 on Sunday. Since miles are worth .02 each, it is obvious that you are paying for the miles after the big bonuses anyway. Cable & Wireless can be contacted at 888-724-8143.