List of $Show variables

[BasilFawlty]

I have a couple of silly questions.

First question: If I have code like:

<vb:if condition="$show['guest']"> or 
<vb:if condition="$show['member']">

Then I can do some action if, for example, a person is not logged in (case 1) or they are logged in (case 2). What of I want to test for a member's post count? For example to test if the user has a post count = 1000

<vb:if condition="$bbuserinfo['posts'] = 1000">

Second question, is there a way to determine all the conditions that could be tested with "$show"?