Nowadays our SVN checkouts of Plone, Zope 2 and Zope 3 consist of lots of svn:externals. Updating the sandboxes often takes a long time because SVN updates the externals one after the other. I came across this Ruby script that performs updating in parallel...pretty nifty..
We are using Plone since 2005 for the for the online representation of groups and scientiic projects of the Friedrich-Miescher-Laboratory.
Thanks to the expertise of Andreas Jung we were able to finish our complex Plone migrations within a short period of time and customize Plone add-ons optimal to our needs.
Gunnar Rätsch, Group leader, Friedrich-Miescher-Laboratory of the Max-Planck-Society, Tübingen
E-Publishing and Web-to-Print Solutions for Zope and Plone