Here's the code (I've been trying without success to get SyntaxHighlighter working on my blog, but not managed it so far), so apologies for the poor formatting.
<cfset variables.rpxapikey="your-rpxkey-here">
<cfif isdefined('form.token')="">
<cfset variables.token="form.token">
<cfset variables.post_data="arraynew(2)">
<cfset variables.post_data[1][1]="token">
<cfset variables.post_data[1][2]="apikey">
<cfset variables.post_data[1][3]="format">
<cfset variables.post_data[2][1]="form.token">
<cfset variables.post_data[2][2]="rpxApiKey">
<cfset variables.post_data[2][3]="json">
<cfhttp method="post" url="https://rpxnow.com/api/v2/auth_info">
<cfhttpparam name="token" type="formfield" value="#form.token#">
<cfhttpparam name="apiKey" type="formfield" value="#variables.rpxApiKey#">
<cfhttpparam name="format" type="formfield" value="json">
</cfhttpparam></cfhttpparam></cfhttpparam></cfhttp>
<cfset variables.auth_info="DeserializeJSON(cfhttp.fileContent)">
<cfif eq="" ok"="" variables.auth_info['stat']="">
Output Everything:
<cfdump var="#variables.auth_info#">
<cfelse>
<cfoutput>Not logged in, An error occured,
#variables.auth_info['err']['msg']#, <a href="http://www.blogger.com/post-edit.g?blogID=35790578&postID=2472009727477842793#application.home#/ login">try again</a></cfoutput>
</cfelse></cfdump></cfif>
<cfelse>
<cflocation addtoken="false" url="#application.home#/login">
</cflocation></cfelse></cfset></cfset></cfset></cfset></cfset></cfset></cfset></cfset></cfset></cfif>
</cfset>