Advice:- I want to build a CMS / e-commerce site

[Buffoon]

Can I ask for peoples options on Joomla / Mambo? I’ve used it on a couple of things, but they were not serious stuff that needed to be mega-secure or handled heavy loads. Worked for what we wanted. I am not advocating either, just curious on peoples thoughts.

[NoddY]

This often comes up here, and Opensourcecms is often recommended.
The glaring omission from http://www.opensourcecms.com/ is Plone and Zope which is solid, expandable and scalable:

http://www.zope.org/
http://plone.org/

[TheMonkey]

This often comes up here, and Opensourcecms is often recommended.
The glaring omission from http://www.opensourcecms.com/ is Plone and Zope which is solid, expandable and scalable:

http://www.zope.org/
http://plone.org/

With an immense learning curve and inability to run on 99.99% of shared hosting...