With iOS4 is it posible to add custom text message alert tones without having to jail break the unit?

Nope, still only the default ones.

Thanks for that - I guessed it wasn't posible as I couldn't find any mention of it

Custom SMS alerts is going to be the next killer-world-changing update for the piephone 5 lol

This annoys the hell out of me! I want the catchphrase buzzer tone.

If there are features lots of people want but are not there, they could always just not buy the next version of the phone until they are there

Shock horror, buying a phone that does what you want