If youve got a little bit of bandwidth and a bunch of Ubuntu machines to update, its almost a no brainer to set up your own local ubuntu repositories.
Read it at arsgeek:
Ive got my own repositories set up and it makes for an incredibly fast install of a new system and updates for existing systems.
What youll need is a high speed connection and about 40GB of disk space on a current Ubuntu install. Ive got my repositories on an older machine runing Ubuntu 6.06. The mirrors are for Edgy.