OK, the JapFest 2008 has been started today and you still have until tomorrow to see lots of performance held in this two days. I went there this afternoon and there were so many people coming already, even though it's only in the early hours. At night, i didn't go there, but Anton said it was very crowded because of the singing contest, otaku contest, and many other games that were held at night.
Tomorrow, there will be a CosPlay (“Reborn! Ambition Cosplay”) which will be started at 10 AM. I can't wait to see the event because i missed it last year. More information can be seen here