Considering the limited supply of XL2370, it may be a while before we see an XL2570.
Availability on Amazon lasted less than one day. It does seem that the local BB stores are periodically getting new inventory.
The XL2370 showed up on Amazon today for $319.99 with free Super Saver shipping and no tax. This is the first time it's been available with Amazon fulfillment.
Now showing in stock for $299.99 with free shipping for online orders at Best Buy. No local availability at the five stores closest to me (North Dallas)...
The P2370 is available at 2 of the 5 Best Buy stores closest to me (North Dallas).
It's a popular monitor and I strongly doubt that it is being replaced.
DreamHardware.com is reporting 9/30/09 as the availability date. It already has 50 backorders.
http://www.dreamhardware.com/store/product/index.php?product_id=1499383