To use this new feature:
1. Edit your page.
2. Highlight the text you wish to format.
3. Click on the text formatting icon in the toolbar .
4. Format the text as you wish and click “Apply Style.”
My students will be SO thrilled. We use Wikispaces all the time and they have always commented that they want more formatting features.
Check out a sample at: http://voicethread4education.wikispaces.com/