Got mine from Northwind today (Tues.) I dunno if you guys sprang the extra $5 for USPS Priority, but I didn't. My total cost was $18.75 and it cam in a legal size envelope with invoice, instructions, and a fair amount of wrapping on the device. It was pretty funny actually, I had no idea what it was until I opened it.
My Athlon 500 is at 650 right now, I'm running the Prime95 torture test and it's doing great. I had to bump the voltage to 1.85 to go above 550. The case on mine was pretty easy to get off, just used a little brute strength after I pried it apart enough to get my fingers in there. The coldplate doesn't look like it'd be too difficult, but you'd have to be really careful and patient to pry off those little clips. I just cleaned off my HSF and coldplate (took off the little foil square too) and reapplied some heatsink compound. I am kinda curious to see what speed the core is, and since that would require removal of the coldplate, maybe I'll do it someday. Judging from my numbers, I would guess 500 though

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Anybody that needs a GFD should order on of these from Northwind. You can't beat the price and it works!
Jason