I wanted to add a little information to this post as I've been using verizon for data for the last 4 years.
It is true that Verizon offers free internet on their 1x network to the 1x only phones. The speeds on this network peak around 140K, not too shabby for a cell phone. They also offer a low speed service called "QNC" that is only 14.4K.
I recently upgraded to a new LG phone that was EVDO capable because I wanted my x50v to be able to link up BT and get on the free network. I found out that you can no longer get on the 1x free network if you have a EV(EVDO) capable phone. I found after researching online that it wasn't Verizon that was limiting the phone, but the phone itself.
These new EVDO phones are capable of data transfer speeds up to 2MB/s, which is insanely fast for a cell phone. I believe this is why Verizon doesn't allow you to use your new phone for free internet, they don't want to give away such high speed internet.
The proper way to connect to the National Access 1x data network is by dialing #777 and using the username
5555555555@vzw3g.com and the password vzw. The username should be your 10 digit phone
number@vzw3g.com for clarification.
There is a file on the phone that stores the connection settings for logging into the Verizon data services (mobile web, get it now, pix, vcast). With these new EVDO capable phones, verizon has started forcing the phone to connect with the username
5555555555@dun.vzw3g.com instead of @vzw3g.com.
This file can be changed and the @dun.vzw3g.com changed to @vzw3g.com which magically allows the phone back onto the network. Also, by having this information stored in the phone, when you log on from the pda or laptop, you only have to dial #777 as the username and password is hard coded into the phone.
If anyone is interested in this, I recommend forcing your phone into 1x only mode and not allowing yourself to get on the EVDO (2MB/s) network. Verizon still allows you to get on the 1x network with a 1x phone, so at least force your phone into 1x mode if you do this.
I'm not trying to suggest that anyone hack their phone or steal anything. When I called them on the phone, they said as long as you have a non EVDO phone, you can get on the internet for free. All this stuff does is force your phone into 1x mode and fix the connection string so that it can properly log on again.
-nate