For those of you with the HPNA version of the GTC:
CompUSA has the Netgear ethernet to 10bt HPNA bridge for $199 (http://www.compusa.com/products/product_info.asp?product%5Fcode=277891 ). There is a $50 CompUSA and $50 Netgear rebate, bringing the cost down to $99.
NetGear has the bridge for $99 (http://www.buynetgear.com/product.asp?sku=1029244 ).
If you own an American Express Blue (or other card which lets you pricematch), you can buy from CompUSA, contact AMEX and let them know it's $99 at Netgear, collect the $100 difference from AMEX, mail in both $50 rebates, and it's free (after 6-8 weeks, when the rebate checks come in).
I kinda wish I hadn't swapped my HPNA touchpad for an ethernet one; HPNA PCI cards are dirt cheap, too, and with the bridge, I could expand my network without running additional CAT5 cable.