I have been using my Nokia 7110 for a couple of days now. A strange feeling. I keep getting it out of my pocket and then realising there's nothing to check -> No facebook, Twitter, email...
I tried to use the WAP browser on the phone but the call was dead. It made me wonder if I could set up my own WAP network. I am still thinking about that and if it would be possible. I am starting to think it would need some special hardware.
I then Googled setting up your own GSM network out of interest and found these slides from a conference in Germany a couple of years ago.
They're worth a read for anyone interested!