Not personally, but have had 2-3 customers with Sprint... Seems to work "ok" though I'm not sure how it'll work if you do gaming etc...
There's also a Wireless broadband (couple of them actually...) and they seem to work alright..
Edit: Otherwise if you've got the cash, you can do this:
125 mile 802.11b WiFi requires LARGE dish at both locations and need LOS between the dishes...
I just realized that even if I know someone with cable or ADSL within a 5km range or even further.... I couldn't use the Wok\\anttena idea . In order for me to receive the radio signal, let it be WIFI or WIMAX or any other wireless broad band signal they would need to have a radio signal modulator/amplifier... and you need a license for that type of equipment... only ISP company's have the licenses.
I could setup this HUGE ass antenna if I can't get a good broad band signal from the ISP.