Question: What is the plural form of "status"?

Answer: 
There are some situations where *status* may be considered countable. In those cases, the plural form can be used as *statuses*. [MacMillan dictionary](http://www.macmillandictionary.com/dictionary/american/status) gives 4 definitions for *status*, and 3 of them are referred to as countable. Personally, I would use *status* as the plural form instead of *statuses*.
I see that I've very late to answer. I usually try to avoid the use of "status" as a plural, instead option to use the near-synonym "**state**".

Take for example these three attempts at pluralizing "status", all of which I've seen coworkers using:

> 
> The product should support the following statuses: Red Green Blue  
> 
>  The product should support the following status: Red Green Blue  
> 
>  The product should support the following statii: Red Green Blue
> 
> 
> 

None of those sound natural, and one is objectively *wrong*. The issue is sidestepped by substituting "states":

> 
> The product should support the following states: Red Green Blue
> 
> 
>