FlashSMS Symbian Software By Symbian Toys
First Symbian Series 60 application able to send flash-sms without needing of any additional service. Nothing to configure, just write your sms and select the recipient.
Flash-sms are particular kind of sms that are shown immediately on recipient device display and after a keypress will disappear without being stored on phone memory.
Download:
FlashSMS v 1.0