And here is the actually post code for each of the House symbols.
Note, I think the "Document" post style looks more like parchment and IMO make the styles look better, but its up to you.
Traditional Code
Gryffindor
[imgleft]http://i560.photobucket.com/albums/ss44/kevinoneton/Miscellaneous/Gryffindor.png[/imgleft]
[align=center][size=10][color=#FF9800]Text Text Text Text[/color][/size][/align]
Ravenclaw
[imgleft]http://i560.photobucket.com/albums/ss44/kevinoneton/Miscellaneous/Ravenclaw.png[/imgleft]
[align=center][size=10][color=blue]Text Text Text Text[/color][/size][/align]
Hufflepuff
[imgleft]http://i560.photobucket.com/albums/ss44/kevinoneton/Miscellaneous/Hufflepuff.png[/imgleft]
[align=center][size=10][color=black]Text Text Text Text[/color][/size][/align]
Slytherin
[imgleft]http://i560.photobucket.com/albums/ss44/kevinoneton/Miscellaneous/Slytherin.png[/imgleft]
[align=center][size=10][color=green]Text Text Text Text[/color][/size][/align]
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Ornate Crest Code
Gryffindor
[imgleft]http://i560.photobucket.com/albums/ss44/kevinoneton/Miscellaneous/GryffindorCrest.png[/imgleft]
[align=center][size=10][color=#FF9800]Text Text Text[/color][/size][/align]
Ravenclaw
[imgleft]http://i560.photobucket.com/albums/ss44/kevinoneton/Miscellaneous/RavenclawCrest.png[/imgleft]
[align=center][size=10][color=blue]Text Text Text[/color][/size][/align]
Hufflepuff
[imgleft]http://i560.photobucket.com/albums/ss44/kevinoneton/Miscellaneous/HufflepuffCrest.png[/imgleft]
[align=center][size=10][color=black]Text Text Text[/color][/size][/align]
Slytherin
[imgleft]http://i560.photobucket.com/albums/ss44/kevinoneton/Miscellaneous/SlytherinCrest.png[/imgleft]
[align=center][size=10][color=green]Text Text Text[/color][/size][/align]