To speed up the and support the smart task entry, I suggest changing the keyboard layout.
I have seen in many iOS applications an extended keyboard that has many of the characters use.
For example I have seen twitter clients have a keyboard that use @ # on the first layout. Thes do this because these are very relevant to creating tweets.
I suggest you have a special keyboard that incorporates the special character you want. :;@!-# on the first keyboard layout.