Let the hive mind of Engadget get that for you.
"As someone who doesn't reside in the USA, I was wondering what would be the best way to get internet for my computer in the US for a couple of weeks? If it were Europe I know I'd look for some prepaid data. Is there anything similar offered by American carriers? A MiFi or a data SIM that I can tether from would work, but I'm trying to maintain a tight budget. Help!"
I also didn't see the HP Compaq nw8440 or nw9440 mentioned, which also now have the Core 2 Duo option.
Perhaps they were mentioned previously...
The only reason I point these out is because I plan on getting a nw8440 soon.
I have been using the nw8240 for some time and love it.