Melanie, I agree. However, WiFi is obsolete technology.
Why don't you buy some decent 3G phone (with or without GPS) and you'll be able to surf the net wherever and whenever you want?
3G is great, but it is very expensive, especially if you are downloading a lot. I am on a $40 a month plan, and I get 150 megs with that. I could go through that in about 10 seconds if I am not careful. For downloading email, it is fine, but if you are watching videos, or downloading apps, then 3g is still too much. I also have a 3g USB stick for my laptop, for the same $40 it is 1 gig, still not very much. Free wifi rocks. I have been helped out in a lot of places, like Paris, London, Edinburgh due to free wifi. Adelaide is great, the whole city has free wifi for everyone to use. We need more cities like that.
WIFI is definitely not obsolete. 3G is good but coverage is still patchy especially with some carriers and some mountainous regions suffer really poor coverage.
4G will be much faster but will take some time to roll out.
The other main problem with mobile data is the cost. Even in your local country you will be lucky if you can get good rates on 3G data (most unlimited plans are actually capped at either 500Mb or 1Gb thanks to the get out clause of a fair use policy).
Roaming charges for mobile data when outside of your home country are insane and you will almost always pay by the Mb. Free Wifi access when you are travelling abroad is a life saver.