I'm currently in the process of deploying a Storefront 1.2 Infrastructure alongside our already existing Webinterface 5.4 Infrastructure and needed an appropriate LoadBalancing Monitor on NetScaler for the Storefront Servers.
If you have choosen another Name for your Store during the Storefront Setup you have to edit the Send String Path accordingly.
Feel free to comment and let me know if this was helpful or if there is an better method/way for monitoring the Storefront Servers.
Update: Citrix is now including a Storefront Monitor with the NetScaler 10.1 Release. I have a new Blogpost on how to correctly configure the new Storefront Monitor in the NetScaler 10.1 Release