I really like this mod and i would love to see it expand a little further so I will lend my opinion.
I think that you should use mygamercard.net instead of the official one. My problem with the official one is the fact it uses iframes and the mygamercard.net flash version is MUCH more feature rich than the other one and it serves the same function.
If I am not mistaken, you could just modify the product.xml to reflect the different gamercard.
Code:
<embed src="http://card.mygamercard.net/$userinfo[fieldg]" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" type="application/x-shockwave-flash" width="198" height="135">
</embed>