smart phone

[Weiii]

I just bought a new phone HTC Touch (http://www.htc.com/product/03-product_htctouch.htm) so im wondering if there is any cool / useful application or maybe some cool hack out there, the only thing i've got on this is doom xD (link to doom if someone wants it: http://www.coolsmartphone.com/forum/dload....p;file_id=2394), so if someone have a good app och hack please share ;)