Here are some mirrors 
http://ftp.stardiv.de/mirmon/mirror-state.html
The language specific installers are usually located in the localized branch
Update: Even 2 days later, the website ist still struggling ver very excessive performance issues:
Apologies – our website is struggling to cope with the unprecedented
demand for the new release 3.0 of OpenOffice.org. The technical teams are
trying to come up with a solution.
Thank you for your patience.