hey Mark, as Candela said, the bberry is available here.
it is offered by both telef�nica movistar and vodafone spain.
vodafone is the better deal but as far as i know, they only offer that unit on cotract and last i knew, vodafone only gave contracts to those with residency here (legit residency that is, just saying, "i live here" is not enough

).
i have heard that movistar bends the rules more but they are also more expensive.
if money is no object, do it with movistar but i prefer vodafone.
pay-as-you-go data usage is very expensive at 2-8 cents/kb sent and received (2 with vodafone and 8 with movistar) so that is not even worth looking at. also, to get itemized billing, you will need a contract so pay-as-you-go is not an option for you.
i�m afraid i do not deal in contracts, only pay-as-you-go and i know you said your spanish is weak but you are very limited as far as english lang. sites with decent, up-to-date info on this stuff so fight your way through the following...
http://empresas.vodafone.es/Vodafone/EmpresasPS/EmpresasPS/0,2607,10000,00.html your best bet would be to get it as a "profesional", see
http://www.vodafone.es/Vodafone/EmpresasPS/EmpresasPS/0,2607,9984,00.html and if you go to
www.vodafone.es/Vodafone/EmpresasPS/EmpresasPSSin/0,2610,8448,00.html , you will see they have a few models of the bberry as well as some palms available.
you can get a "linea de datos" (data line) as well which will provide you with inexpensive data use.
IF YOU CAN'T GO THE COMPANY OR PROFESIONAL ROUTE, vodafone also offers the bberry and palms to individuals. see
http://www.vodafone.es/Vodafone/ParticularesPS/ParticularesPS/0,2603,21613,00.html . pricing is at
http://www.vodafone.es/Vodafone/ParticularesPS/ParticularesPS/0,2603,21616,00.html . the one you would need is the "Tarifa plana de correo e Internet (nacional y en roaming*)" one and is only available with a 12 month minimum contract.
this can all get VERY complex so what i recommend you do is call vodafone when you arrive. the page at
www.vodafone.es/Vodafone/EmpresasPS/EmpresasPSSin/0,2610,17554,00.html has the number to call. ask for an english speaking operator since you will not get by in spanish. often times they are eager to help more when they know you don't speak a lick of spanish.
this may all be available only to "empresas" (official companies) and may be a moot point but it is really the only way to go about it.
movistar seems to only offer the bberry to companies, see
http://www.movistar.com/empresas/servicios/correomovil/blackberry.htm .
basically, the only service i offer as far as contracts go is consulting. i charge my clients 50�/hour as a middle man between them and the cell ops. to get things done and have questions answered. gotta put a price on my knowledge and language skills

after a few days of looking through all of this yourself, you will wonder why i don't charge twice as much :jeje:
hey, you asked!!!
saludos,
jer...