Maintaining a Drupal site, or a collection of sites is much easier if everything is kept completely separate--Drupal core, contributed modules, and the site itself. This is even more important if multiple sites are hosted on the same server. Drupal's own multi-site support can be a nightmare to maintain, believe me! (e.g. when you want to upgrade modules or core). A must simpler and easily supported configuration is to keep everything separate and to use symbolic links to tie it all together. For example, I
Drup.org exists as a place for me to document the things that I have learned while building dynamic websites and hosting platforms.
My business (designing Drupal websites) gw.ca . Below are some of the sites that I have built:
Newlife Church Toronto | God's love, truth, and power for downtown Toronto
in Christ: Andrew Fountain's blog | In Christ
GoodWeb — technology done well | gw.ca
Love in Truth | Let us not love in word or talk but in deed and in truth
Euroserv