Update (3-9-12): "Just wanted to let you know that WEA has included the US Entreat 2LP in their Record Store Day 2012 one sheet book pdf. They are taking orders from retail stores now. I attached those two pages from the full pdf book here.
It's listed under "RSD ALL RETAIL RELEASES", as opposed to "RSD EXCLUSIVE RELEASES" or "WEA RSD RELATED VINYL CATALOG". I guess that just means, as you said in your post, that it's not technically a RSD release, but just released at that time?
I think it's funny that they include criticism of the remix in the actual one sheet. ("a sonic makeover that some fans have complained dampens Boris Williams' drumming.")
Also noteworthy to me was the part (on page 2) about a 9-track sampler being available. I'd definitely like to get my hands on one of those!" (Thanks Zack)
Update (3-27-12): Our old friends at Ideal Copy are taking pre-orders, and F.A.B. Distribution has it listed for Canadian retail orders.