I just did a jailbreak on my 3g 3.0 and I got the following added immediately through Cydia:
winterboard settings
iBlacklist
Bossprefs
anyway everything works as ar as I can tell except that when i ENABLE iBlacklist the tone I selected from ToneFxs for incoming sms does not work. If iBlacklist is enabled I get whichever tone I have selected in the OS Settings. If I disable iBlacklist then my sms tone from ToneFxs works. One other thing to note is that the other sounds from ToneFxs like the keyboard clicks stays working regardless of iBlacklists status. Any ideas as to why or if they both can work together?