That is exactly what my neighbor did; he got a 3wk out appt and built a DirecTV online acct and went into the pending order/install and looked at the calendar and selected one 3 days out. You never know what the install company tells DirecTV regarding their REAL avail.
I just made the switch from Dish. Install on the 7th. Here is the deal I got:
Verizon Discount ($10 off for 12 months) AAA Discount ($10 off for 24 mos) New Customer Deal ($23 off for 12 mos) $50 Referral ($10.00 for 5 months) $300 Coupon Booklet (Savings Certificate Book) HBO/STARZ free for 3 mos SHOWTIME free for 12 mos