These are not International Domain Names per se, as they contain all ASCII characters. Might be worth looking for some Spanish IDNs...still some nice stuff open to register, especially in .net.
http://en.wikipedia.org/wiki/Interna...ed_domain_name
An internationalized domain name (IDN) is an Internet domain name that contains one or more non-ASCII characters. Such domain names could contain letters with diacritics, as required by many non-English languages, or characters from non-Latin scripts such as Arabic, Hebrew, Chinese or Hindi. However, the standard for domain names does not allow such characters, and much work has gone into finding a way to internationalize domain names into a standard ASCII format, thereby preserving the stability of the domain name system.