Thyrogen Shortage

So after tonnes of digging, I knew I would find something in writing about this shortage. There is nothing to be found on either Genzymes website nor ton the Thyrogen website. I as a patient requiringthis drug find it somewhat shady that this info has to be a dirty little rumor floating around. So you don't know anything for sure until you go to your pharmacy to fill your script only to be told some genaric info about it not being available. Then what? Treatment is rescheduled? Cancelled?
So I finally got my hands on the info, the letter is addressed to healthcare professionals and was dated in Nov 2010. Causually mentions a the delay will be for a "short period" and advises Dr's to "consider this when scheduling patients".
I spoke with a local Thyrogen rep, who told me I will not be able to fill my script until AFTER May when shipments resume. She could not tell me the reson for the shortage. Her carefully scripted answer let me with more questions than answers.
Here is the letter:

What's your take on the issue?
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Edited on Feb 15 2011 to add this recently found letter with a slight bit more info. Thanks to Thyroid Cancer Canada for posting it