Hello all...long time lurker first time poster here, but hopefully I have something to bring to the table as far as these CECBs go. (
Mods, please move this post if it would do members more good in another thread )
I ordered my coupons some time ago, with them expiring on the 27th of this month. I've been anxiously waiting the release of the free TR-40, then free DTVPal, and now $59.99 DTVPal before my coupons expire but it looks like I'm out of luck(and have grown more frustrated by the day as each new tidbit was released), so the DT250 looks like my best option.
I'm actually relieved that BB is gonna be carrying them, as it likely means I can go buy some Insignias before my coupons expire and exchange them for the DT250s... if the BB's in my area would ever carry them. It seems like eastern US states (like PA where I'm at) aren't getting these things as quickly as western US states.
I found out something interesting today, which I'm hoping will be useful/interesting, though maybe upsetting news to those who are planning to buy the DT250, or even the Insignia. With less than 4 days until my coupons expire, I went to my local BB today to see if the Insignia's that they carried were the -APT (pass through), which they weren't (and even if they were, the salespeople wouldn't know, as I asked one if the boxes they had have the APT feature and the guy said "yeah, if you have an analog TV you can use these").

At any rate, there's a Kiosk at BB that lets you look for items in the store or on BB's website, but it also serves as an employee Kiosk for them to check inventory, pricing, order status, etc. As I walked by, I noticed that some employee had left themselves logged in, and with me chomping at the bit to know if and when the DT250's were gonna come in, I quickly jumped in. (As an aside, and contrary to what I'm about to tell you, all BB employees must be required to push the Insignia boxes, as they will claim that they are the only boxes BB will be selling, whish is a lie) I was surprised at all the info that they have on there. The good news I found out was that my store has 70 on order (but not in transit yet)...and there are over 600 total on order within about 100 miles or so radius.
The disappointing news cam when I clicked on a link on the paged titled "Advanced pricing" which displayed this:
while BB is selling the DT250 boxes for $59.99, the cost to them per box is $38.50. 
I about fell in the floor when I read that.
I'm annoyed to say the least. Anyway, knowing that they jacked up the price on the DT250,
I decided to check the price of the Insignia's and again I discovered they're selling them for $59.99 but they cost the company $39.30.
I guess what bothers me the most is, aside from the lack of supply for many of the better boxes that we're looking for; we're being forced to buy these boxes if we wanna have TV after Feb 2009. I would be willing to bet that the coveted DTVPal really does cost only $39.99 as it was advertised, but they're gonna go for $59.99.
Instead of taking advantage of us by adding 50% to the price of these boxes, stores like BB would be smart to give us them in exchange for the coupon. If we could just go in, hand them our coupon, and leave with the box without paying them a dime...they would still be making $1.50 profit per box that they sell! If they were advertised as "free" with the coupon, and 1 million people bought them that would 1.5 million dollars in Best Buy's pockets.
It's very disheartening. I wish I could have printed out those screens, but the stupid printer that was attached to the kiosk kept saying it was out of paper and even though I checked it...I couldn't do too much without attracting the attention of the BB employees that wander around. I did manage to snap a picture of the screens with my cell phone...but it's such a crappy camera phone that you can barely read it. Not like it would really do me much good anyway...I doubt the manager of the store would be willing to give me the boxes for the price of the coupon in exchange for me deleting the pictures or something.

Anyway, sorry for such a long first message...but I hope it was worth it and the information is helpful. I certainly have found these forums to be a big help over the last few months at keeping me informed on these CECB's.