I'm not sure this is possible but it would be extremely helpful if so. I like to open many WordPress blogs at a time for all different reasons from developing plug-ins to playing around with the internals to personal blogs to hobby blogs and onward.
It would be really helpful if I could share the core files (they are all static anyways right?)
Allow updates and upgrades to be applied globally
Allow plug-ins to be available for any site to use
Allow any uploads to be available for any site to use
Allow any themes to be available for any site to use
Reduce disk space
Severely speed up new WP installations
The only thing that would be unique is the wp-config.php file.
I'm not a WP expert or even advanced user so I'm afraid if I do manage to share the core - bad stuff might start happening.
If it's not possible I would really appreciate it if anyone has any alternatives to the above list. Right now it's just too much trouble (I'm talking like an hour) to install a new WordPress installation - all the "normal" plug-ins I install, configure the plug-ins, configure WordPress, install the "normal" themes, configure the themes, and do any updates. --- For each installation.