I have the dreaded white screen problem.
I want to use a theme which is compatible with WordPress 3.0, so installed a previous version of WordPress which I had on my computer, instead of downloading 3.0.1.
The installation went fine but then when I activated the new theme, I got the white screen. Looking into it I realised I had made the basic error of actually installing an older version of WordPress (2.7). Newbie mistake! So I deleted all the WP files from the remote site and from the database and then did a completely fresh installation with WordPress 3.0.
I hoped this would mean I could start again but instead I still have a totally blank screen and can't even complete the new installation as get the blank screen for that page too: http://www.education-interaction.co.uk/wp-admin/install.php
Feeling very stuck now - any tips would be great.