I use Verio as my hosting company.
One tech guy at the company who was getting big on joomla gave me a script to run through the shell, which when executed would set the permissions of all directories to be writable – thus allowing me to install an extension or a template. Running another script turned all the directory permission back to how they were before.
This had benefit of meaking changing all relevant directories in joomla that need to be writable to being writable in just a second – and then making then unwritable again for security.
Unfortunately, his script didnt work – since it was configured for his server settings, and I never modified it.
But this is my suggestion – could Joomlart do something that would make changing directory permissions easier. It’s a pain spending 15 or so minutes clicking and clicking through the necessary directories to make them writable!
Could there even be a quick start package with all the relevany joomla directories set as writable by default?