Merge lp://staging/~michael-sheldon/jokosher/export into lp://staging/jokosher

155 + i = 0
156 + for samplerate in Globals.SAMPLE_RATES:
157 + sampleRateCombo.append_text("%d Hz" % samplerate)
158 + if samplerate == Globals.DEFAULT_SAMPLE_RATE:
159 + sampleRateCombo.set_active(i)
160 + i += 1
161 +
162 + i = 0
163 + for bitrate in Globals.BIT_RATES:
164 + bitRateCombo.append_text("%d kbps" % bitrate)
165 + if bitrate == Globals.DEFAULT_BIT_RATE:
166 + bitRateCombo.set_active(i)
167 + i += 1

You should use: for index, samplerate in enumerate(Globals.SAMPLE_RATES)

54 + ("Ogg Vorbis", "ogg", "vorbisenc bitrate=%d ! oggmux", True, True),
55 + ("MP3", "mp3", "lame bitrate=%d ", True, True),

Consider using: "bitrate=%(bitrate)d" and a dict with the % operator for clarity. This will also help if you have a second parameter in the future and you want them to be reorderable. Though this isn't a big deal because you should be able to change this code later without anything being backwards in compatible.

2224 + <property name="label">_Export...</property>

If we include a feature for exporting a project to a USB stick, then what should this be called? I would prefer Export for exporting a full project, and something like Render or 'Export audio file' for this feature.