That's quite long, actually. Is this airmail? Standard USPS?

Did you fill in the customs declaration form 100% correctly? Otherwise it will be stuck in customs for a long time.

In my experiences in shipping from the US to Canada, Airmail takes 1-3 weeks.  For shipping from Canada to Europe,  1-3 weeks for airmail too.

The tracking number you have can be used to track the item internally with the USPS.  At least you can find out if it made it out of the country.  That being said, Canada Post doesn't do any tracking until after 55 days from the day of receipt by Canada Post.  So see what your options are with USPS.
Good luck!

One thing you need to know: Germanys' customs are somehow complete killjoys.

Even if I send something from Switzerland and really take care about all the custom forms, they always seem to find something they don't like about it ! The best thing about that story is, that first off all it takes up to two weeks before you get any informations, and then sometimes they don't even tell you what the hell is exactly wrong in the documents. Also in the end they charge you with humongous fees, not even stating what they are for.

One good advice for the future: Always use a method which includes track'n trace for the entire journey, with that you can properly see what is actually going on (as I stated above it may be "Idling at the German Customs, for no good reason").

I also had some troubles receiving oversea packages. Here in Germany, customs are indeed killjoys. They are taxing everything thats over 20e worth, investigating it, checking it etc. Some packages came with more then 2 months delay, and some came practically immediately. Its a matter of luck and of neatly filled documents.

After a few bad experiences, I would just notify the guy I'm buying from to exclude any mention of price and receipt in package and mark the package as a gift. The effect of this is that the customs office calls you directly when the package arrives, since they usually have no idea about its value (so they cant just automatically sort it out, or leave it on ice waiting to get sorted).

= you get your package faster

Thanks for the advice guys.  Unfortunately, the buyer didn't want to wait any longer.  He claimed it should only take a week to get there....not sure what shipping method he's thinking of.  I processed his refund just now.  At least paypal/ebay refunded me all of their high priced fees.  I'm ONLY out $12 shipping and a V5 Voodoo Mac card

What a horrific ebay experience.  First one in over 10 years that went bad.  I'm starting to understand why some US sellers don't want anything to do with selling overseas.  Ironically, I just sold my old iPhone to a guy in Italy and it was a flawless transaction.  Learned that if you are going to use USPS, at least use Priority mail.  It tracked the phone all the way to his doorstep.  Everything I've sent 1st class, the tracking ends once it leaves the USA.

Update - the buyer received the card on August 18th....two months after I shipped it USPS 1st class.  He promptly paid me the full price of the card + shipping.  Since ebay refunded all the selling and paypal fees to me, I actually ended up about $8 ahead this way.

Lesson learned - don't send packages 1st class to Germany....period!

I have had packages shipped from the US by the US Postal Service many times and never had a problem. So I disagree with your statement.