Comment 9 for bug 669267

> I gather the .png format with either go away or be put as an option in
> the export bitmap selection (with the appropriate filename extension).

'File > Export bitmap…' _does_ create a PNG file by default (it is the only raster format Inkscape exports to at the moment), with the correct file extension (*.png) appended in the export dialog. Please read the manual page about exporting:

Inkscape manual - Exporting PNG (Portable Network Graphic) Files
<http://tavmjong.free.fr/INKSCAPE/MANUAL/html/File-Export.html#File-Export-PNG>

Note that 'bitmap' image is used equivalent to 'raster' image:
<http://tavmjong.free.fr/INKSCAPE/MANUAL/html/Glossary.html#bitmapgraphics>
<http://en.wikipedia.org/wiki/Bitmap#Other_bitmap_file_formats>