More about creating a remote object and passing an argument to a cfc from Flex 3 can be found at my blog post, HERE

Given you have a CFC that returns a query, you can create a resulthandler function that can then be binded to a datagrid.

<mx:Script>

<![CDATA[

import mx.collections.ArrayCollection;

import mx.controls.Alert;

import mx.rpc.events.ResultEvent;

[Bindable]

private var myReturnedData:ArrayCollection;

private function result(evt:ResultEvent):void {

myReturnData = evt.result as ArrayCollection;

}

 

<mx:RemoteObject id="mycfc"

destination="ColdFusion"

showBusyCursor="true"

source="cfctest.thecfc"

result="result(event)"

fault="fault(event)">

</mx:RemoteObject>

 

 

<mx:DataGrid id="mygrid" width="487" height="100%" dataProvider="{myReturnData}" />

 

 

<mx:Button label="Get All Names" id="btngrid" click="mycfc.returnallnames()"/>