It sounds like you suggesting that another mobile theme (paid? free?) be created for wordpress.com blogs, so I will flag this thread and have our Moderators move it to the Themes Forum where the Theme team Staff will notice it.
If so, we do not have access to the mobile themes. There are a few themes here that have their own mobile theme, but in general, it is a generic mobile theme that appears with most themes. There is no CSS or anything that we can access on the mobile side.