I actually got something pretty workable:
Code
<hotspot name="bubble2" scale="0.5" style="skin_base_2" crop="155|192|80|80" ath="-62.81" atv="-1.79" distorted="true" />
<layer name="bubble2_inner3" url="%SWFPATH%/plugins/textfield.swf" parent="hotspot[bubble2]" align="lefttop" x="39" y="40" width="340%" height="195%" bgcolor="0X333333" bgalpha="1.0" bgcapture="true" >
<layer name="title" parent="layer[bubble2_inner3]" style="text" align="top" y="2.5" width="100%" css="text-align:center; color:#FFFFFF; font-family:Arial; font-weight:bold; font-size:10px;" html="Textbox" />
<layer name="textarea" parent="layer[bubble2_inner3]" type="container" align="top" x="0" y="20" width="250" height="130" maskchildren="true" >
<layer name="text" parent="layer[textarea]" style="text" enabled="true" align="lefttop" x="0" y="0" width="100%" autoheight="true" css="text-align:left; color:#FFFFFF; font-family:Arial; font-size:10px;" html="data:testtext" ondown="draglayer_vertically_within_parent();" />
</layer>
</layer>
Using this code gets me very close to what I want to be seeing. I just lose a lot of the text quality when maskchildren="true" is enabled.