As renrut noted, wifi is widely available now and most probably all major Internet providers have webmail access.
You might find this thread interesting:
It's quite possible that you'll have to pay for dial-up in addition to paying for DSL with Verizon - you'll have to contact them to find out for sure. In addition to the fee you might incur long distance charges depending where you are.
If you're going to be traveling for an extended time, you might want to consider replacing your home DSL service with BroadbandAccess or Verizon Wireless NationalAccess plans.
From Verizon's website:
average speed is 60 to 80 Kbps.
typical download speeds are 600 Kbps – 1.4 Mbps and typical upload speeds are 500 – 800 Kbps if you have an EV-DO Rev. A-capable device. If you don't, the download speeds are 400 – 700 Kbps and typical upload speeds are 60 – 80 Kbps.
Look at this post from Steve. He uses Sprint. Basically, he only uses mobile internet:
http://www.classbforum.com/phpBB2/viewt ... ight=#2757
My setup is:
Cable internet at home, wifi on the road and very rarely I'll connect my cell phone via usb to my laptop and access the internet that way. My cell plan has a low monthly data amount so I make sure Windows automatic updating and antivirus auto updating etc. are turned off
if I access the web that way.