Template: yes, there is one default template, you can see it at
www.arcadeous.com. I'm going to make 2 more templates by december (one will be completely free and another one will cost about 30 euro).
New game packs: I'm going to release new low-cost gamepacks regularly and finally get about 2000-3000 games in total. And yes, there is a way to bulk add new games to the database - you just need to upload your images and swf files and prepare the sql file (you'll see its format in the base pack), My script's admin CP has a special interface for applying such SQL queries.