Array contents as a variable

Noob question here, I've got all this data in an array, but I can't figure out how to do anything with it. I need to use one element in a SQL update query, the other element is just for display purposes only. This works:

<cfset RecID=[]>
<cfset DistListNames=[]>    
<cfloop list="#form.ListName#" index="listcount">    
<cfset arrayAppend(RecID, listFirst(listcount,":"))>
<cfset arrayAppend(DistListNames, listLast(listcount, ":"))>    
</cfloop>    
<cfdump var=#RecID#>    
<cfdump var=#DistListNames#>

But other than displaying those little green boxes on the action page, I can't do anything with it. How do I set variables from the contents of RecID and DistListNames?

Thanks