The inkscape developers have been drastically improving the functionality of the Text tool in inkscape for the 0.91 version. One improvement to the text tool is that when looking at the font list, inkscape now displays the fonts that are currently in use in the document at the top of the list. This super simple improvement makes the text editing user experience much better, as the user had to hunt through the list of all fonts to find a font they had already chosen.
The currently used fonts shortlist is available in both the font list in the tools control bar:
and in the Text and Font dialog box: