In the version of Tomboy included with Feisty, support for bullet points has been added. Most of the notes I make are lists of some description, so it's nice to be able to let Tomboy worry about indenting for me. Tomboy's style of bulleted list even makes the note more readable, which gives me added incentive to plough through my various todo lists.
To make a bulleted list in Tomboy, just type * or - at the very beginning of a line. When you press the return key, bullet points will automatically be inserted.