I've put my older worlds onto the Sims 3 exchange (hooray for decent upload speeds, at last it worked!). Simsample's Studio
If you require the CAW files for those, they are uploaded to 4Shared. If you are not a member at that site, try the login information given on Bugmenot to gain access. Otherwise, try the username [email protected] and the password modthesims (all lower case). 4Shared changed the requirements so that you need an account to download files.