Every laptop power supply I've ever come across has been of the auto-sensing variety, and will certainly work in Spain (220V).
As for modems, you can pick up a phone socket adapter for a couple of quid from Maplins.
If you want a cheap laptop, I may be able to help. My mate works in IT for ICI and they are flogging off old Toshibas for about £80 complete with carry case. They are (I think) Pentium 100s with 32Mb RAM. Should be adequate for web browsing, email etc.
For international access check out
http://www.ipass.com/partners/isp-partners/europe/
If you're interested drop me an email.
pilot-lite
[This message has been edited by pilot-lite (edited 12 January 2000).]