Eugene & I were able to determine that A2A (while a spammer of this forum) is simply a friend of the Mixshop folks...and an earlier version of their site was almost a blatent copy of Mixshop. It seems to have evolved somewhat.
I've seen the filament from Mixshop and it's very similar to Ultimachine's...the big difference over Ultimachine is the speed of delivery...I can get filament from makerbot.ca or mixshop (or A2A) in as fast as 2 days if I need it...Ultimachine takes a min of 10 days if shipping into Canada. I just got a 5lb spool of PLA and that's how long it took. It was only marginally cheaper to ship it to my US address but my time to go there is worth more than the $7-8 I would have saved.
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johnbiehler.com]