I just wanted to say THANK YOU for the help; the Netgear XETB1001 adapter kit works well. I bought it at Best Buy in case I had to return it. To reiterate for those who may be looking for a similar solution, I needed wifi connectivity in a separate building (the garage), about 75' away from the main house with the DSL internet connection. The range on the 2wire wireless router in the main building was too short, and then when I tried to use my Airport Express from out here, I had to hang it out the window and hardwire it to my laptop.
By using the ethernet powerline adapters, I've been able to create a new wireless network in the garage, even though the garage has its own circuit breaker box. It seems that as long as the two breaker boxes are on the same electrical meter, the powerline adapters can work. They were, however picky about which outlet I was plugged into. They didn't like the first outlets I chose and I changed to other outlets across the room and then they were happy.
The connection isn't absolutely flawless--sometimes the signal drops momentarily, but I do listen to internet radio for hours on end while also doing work on the internet.
Thanks again!