HP has just released the Comware 7 simulator for HP Partners.
HP Partners can register and login on the HP FlexNetwork dropbox site (https://h30620.www3.hp.com/login-sales#go) and download the code from the downloads section.
UPDATE 22/3/2014
Thanks to info from Lindsay Hill (http://lkhill.com/hp-simware-comware-os-simulator/) the registration code link can be found here:
http://h40060.www4.hp.com/email/eg/apr-13/pages/tools.html#5
UPDATE 03/6/2014/
This post is outdated, since HP has released a new version of Simware for both Partners and Customers and is free to download without any registration code.
See https://abouthpnetworking.com/2014/04/28/hp-comware-simulator-7-1-50-released-for-public/