A lot of the Flash tutorial sites contain templates as well - since they tend to include downloadable source files as well, and that's what a template is really.
FlashVillage Plenty of 'em, and regularly updated.
Flash4Layouts If you're prepared to pay, these might be worth a look.
FreeFlashTemplate Despite the name, some aren't actually free.
TemplateMonster Thre are an awful lot here, categorized by style; a definite plus is that they also specify if it requires a certain version of Flash.