I was having the WSOD problem on my brand new install of WP 2.7. The blog was showing fine, but whenever I was in the admin area and I would go to the plugins page it would give me the white screen after minutes of nothing.
I tried different themes, uninstalling all of my plugins, and multiple other hacks I found on Google. Nothing worked at all.
But I found one thing that solved my problem instantly that I thought I would share for anyone else with this issue.
My server was running PHP 4, so I added the below to my HTACCESS file to make the server run PHP 5. PROBLEM SOLVED IMMEDIATELY. Hope this helps someone else out there. It should be stickied.
AddType application/x-httpd-php5 .php
AddHandler application/x-httpd-php5 .php