As Lee and Nicola previously recommended Servcom, I would like to reiterate their service.
I have had installed a "squarial" on my patio for the last four months, which gives me both internet access and a telephone landline.
The speed is 500k, although faster speeds are available. The cost is approx: €49 per month which includes 300 free minutes of telephone calls within Spain.
I have found the service reliable, and the company very efficient and obliging.
Give them a call, you may be surprised.
Regards,
Lorraine Braid.12-3-07.