Well, it's quite easy to do now, Molly. I used GIMPressionist. I made a text brush (white text on black background 128 x 128 px)with different words in different angles/positions (extension .pgm is used, not .gbr or .gih) and placed it in .gimp-2.6/GIMPressionist/Brushes folder. If the folder doesn't exist you need to create it.
Select your image, and duplicate it. Change layer mode on top layer to Overlay. Run GIMPressionist on the bottom layer. If your image is in color, fret not, you can desaturate afterwards.
Select the text brush, and update the Preview. Switch to the size tab and raise the minimum/maximum sizes to suit. Reset the Preview before re-applying the new size parameters.
Once you're happy with the text size after running GIMPressionist. You'll need to readjust the top layer mode to Hard Light, then run the bottom Layer through
PC's Dragan Tom Keil's PhotoIllustration filter in Artistic.


Ignore the mouse cursor in the bottom picture.
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"In order to attain the impossible, one must attempt the absurd."
~ Miguel de Cervantes