No, the only way I could figure out to get the "debugBuild" to work was if I created a preset that used the "SD.Tasks.Base.ConsumeLptTemplate" preset (see below):
<preset name="uFACTS Debug" lastModifiedOn="2007-09-05T11:45:46.375-05:00" createdBy="Me" isSealed="false" xmlns="http://sd/llblgen/pro/presetElementDefinitions.xsd">
  <supportedPlatforms>
    <platform name=".NET 2.0" />
    <platform name=".NET 3.0" />
  </supportedPlatforms>
  <supportedTemplateGroups>
    <templateGroup name="SelfServicing" />
  </supportedTemplateGroups>
  <taskPresets>
      <taskPreset name="SD.Tasks.Base.ConsumeLptTemplate">
        <parameters>
          <parameter name="destinationFolder" value="" />
          <parameter name="templateID" value="MySampleLPT" />
          <parameter name="emitType" value="allEntities" />
          <parameter name="debugBuild" value="true" />
        </parameters>
      </taskPreset>
  </taskPresets>
</preset>
When I execute the code in my actual environment, I am using a task which is based on the the CodeEmitter task:
        <task name="MyClassGenerator" assemblyFilename="SD.LLBLGen.Pro.TaskPerformers.dll" 
            taskPerformerClass="SD.LLBLGen.Pro.TaskPerformers.CodeEmitter" description="Generates my classes (test for debug)" isOptional="true">
            <supportedPlatforms/>
            <supportedTemplateGroups/>
            <dependencies/>
            <parameters>
                <parameter name="destinationFolder" value="TestClasses"/>
                <parameter name="filenameFormat" value="[elementName]Test.[extension]"/>
                <parameter name="templateID" value="MySample"/>
                <parameter name="emitType" value="allEntities" />
                <parameter name="templateBindingDefinitionName" value=""/>
                <parameter name="failWhenExistent" value="false"/>
            </parameters>
        </task>
Inside the MySample Template, I use the syntax: 
<# MySampleLPT #>
So - I guess having the different preset is causing it to execute differently...  The question becomes, how can I get the debugBuild working without using the SD.Tasks.Base.ConsumeLptTemplate task?
I've looked throughout the forum and everything I've tried just gives me the assembly, except when I us the SD.Tasks.Base.ConsumeLptTemplate task - that's the only time I can get the source...
HELP!!  Thanks in advance...