Correction: according to http://launch.avalon-asics.com/, Batch #2 will sport 3 modules for 66 GH/s and 450W of power at $1500, with a 4th module available for $500 to add another 22 GH/s and 150W of power.
Originally, Batch #2 was supposed to carry 6 modules, then it was announced that there would only be 4 modules. Now it's 3 modules for $1500 (higher than Batch #1) with an upgrade option to 4 modules.

And, they are saying: "units will ship starting March 6th to April 5th, 2013."  <---- that's a pretty wide delivery date range...

Sanitizing findings against Jeff Garzik's experimentation, it looks like the raw power consumption on the Avalon is higher than specified: "66.3 Ghps / 620 Watts / 5.6 Amps  thanks to Kill-A-Watt."
620? It was advertised at 450W!  So this means that Avalon's 88 GH/s miner will be even higher than the advertised 600W.. probably closer to 900W..

My biggest concerns with Avalon: 1) power consumption, 2) no customer support with general shadiness, 3) Made in China, 4) uncertain delivery date, 5) the fact they proclaim they are Open Source but no source is made available.

My biggest concern with BFL: extreme delay (now 4 months) with a delivery date that continues to shift to the right - I hope they can meet February delivery as currently planned in order to put an end to any BFL concerns.