Oh, one more on the EC2 Word press thing; if you want pretty permalinks (i.e., http://robinosborne.co.uk/2011/09/08/pretty-permalinks/ ‎ instead of http://robinosborne.co.uk/?p=85), and you’re running WordPress on an EC2 installation, before you select it in your WordPress “settings” section be sure to edit your Apache config first:

Pop open PuTTY (or whatever terminal you use), log in, run

sudo nano /etc/httpd/conf/httpd.conf

hit ctrl+W and type “override”, do it again until you see:

#
# AllowOverride controls what directives may be placed in .htaccess files.
# It can be "All", "None", or any combination of the keywords:
#   Options FileInfo AuthConfig Limit
#
    AllowOverride None

Change the None to FileInfo, hit ctrl+X to save and exit. Then restart apache with:

sudo /etc/init.d/httpd restart

Done. Hopefully. YMMV 😉