IBM won Ceibals server bid, providing x3105-series tower servers. These are dual-core 1.8GHz Opteron 1210 machines with 2GB RAM and two 160GB SATA drives. Much to my joy, they are running Debian 4.0 etch, and providing DHCP, Dansguardian-filtered web access, and various monitoring services.
Read the summary at times.debian.net and the complete blog post about it here
The OLPC deployment here is being run as part of Proyecto Ceibal (Ceibo is the national flower of Uruguay), a presidential initiative to equip each child with a laptop. The Ceibal offices are housed in a Montevideo complex called LATU, or Laboratorio Tecnológico del Uruguay, which is a public/private sector cooperative technical lab now responsible for much of Uruguays technical certification and quality control programs, as well as serving an incubator role for various engineering and technical projects.