Primitive types (number, string,boolean) not supported as arguments from views

After not getting any argument fields in the plugin setup for rules_views_executor, I dug in to your code, and found that only Identifiable datatypes where supported as arguments from views to rules. This effectively limits argument types to nodes, users and comments. I found that my brilliant plan failed due to this, and set out to find a solution.

Argument values are already passed to rules_views_executor_execute_ruleset() directly from the views plugin, so the values were already available.
I made some changes to rules_views_executor_execute_ruleset(), and some in the rules_views_executor_plugin_row_ruleset class, but all together nothing major.
I'll try to make some patches for you tomorrow (my cvs foo is a little rusty). Before that I want to ask you why you chose not to implement support for primitive types.
Where there some major problems that I should be aware of?

-Vidar