We have been using Mambo since it first came out in Dec of 2001 and migrated to Joomla in Sept of 2005 when the Mambo project forked and the first version of Joomla came out. Mambo at the time was the best CMS available, now that would be Joomla.
We offer Custom Website Design Services utilizing Joomla and or Mambo if you prefer. We also offer Upgrade Services to either get you up on the latest version of each or Migrating you from server to server or from Mambo to Joomla. There are a lot of reasons to migrate to Joomla from Mambo, mainly though its that they offer more 3rd party integration in terms of components, modules and plugins. Plus the new version of Joomla 1.5 is worlds better in terms of building in new functionality. We offer 1 year of free hosting with each new Website we design and have %99.999 uptime with daily backups. We can even email you the daily database backups if you wish for your own internal development. Each new WebDesign comes with private classes teaching you how to add content and images so you can become your own webmaster or we can take on that roll if you prefer. Each new site design also comes with the "Beginning Joomla, From Novice to Professional" book. Contact us today. to find out how we can help you get the site you want.