Here is a list of the brave hosts who have signed up to MageBenchmark, view the results now

• demo.magentoecommerce.cn
  [CN] Provided by Magento Ecommerce
• www.webhost.uk.net/magento
  [GB] Provided by WebHost.Uk
• demo.sonassi.com
  [GB] Provided by Sonassi Hosting
• magento.demo.gridhosted.co.uk
  [GB] Provided by Tsohost
• magento.ngx.nl
  [NL] Provided by eUKHost
• magentodemo.d-hosting.nl/magento
  [NL] Provided by D-Hosting
• mijnmagento.nl
  [NL] Provided by phpBBhost
• magento.demo.websolutely.nl
  [NL] Provided by WebSolutely
• dx3webs.com/magento
  [UK] Provided by dx3webs
• xencube.info/magentodemo
  [US] Provided by Xencube
• demomagento.nginxhosting.com/magento/index.php
  [US] Provided by Nginx Hosting
• demo.cosmocommerce.com
  [US] Provided by Cosmo Commerce

• magento.duplika.com
  [AR] Provided by Duplika Internet Solutions
• www.mdg-it.com.au/magento
  [AU] Provided by MDG-IT
• nginx.openstream.ch
  [CH] Provided by Openstream Internet Solutions
• magentodemo.virtua.ch
  [CH] Provided by Virtua
• magento.activevps.dk
  [DK] Provided by Active VPS
• demo.web-experiment.info
  [HU] Provided by Web And People
• demo.dreamdivision.com/magento
  [NL] Provided by Dream Division
• demo.magentopartner.com
  [NL] Provided by Pro Contractors
• demo.magentohosting.nl
  [NL] Provided by QBell
• demo.magemojo.com
  [US] Provided by ez.newsletter, LLC
• www.magentify.com
  [US] Provided by SimpleHelix
• magento.om-creations.net
  [US] Provided by OM Creations
• www.magentocontainers.com
  [US] Provided by Crucial Web Hosting

You can find other Magento hosts (who haven't yet taken part) on the Magento Wiki.