I know the stacked team has their hands tied right now, so I don't expect any of these ideas to get implemented soon. However there are several aspects that need to be improved in the voices section to encourage us to use voices instead of the forums for ideas. This post isn't just for us, but is for the stacked team to have us as the users more inclined to use voices.
1. Allow users to edit their replies. I have plenty of times where I find out I made a mistake in my post and fix it in a jiffy. The stacked forum allows this, so should voices.
2. The user link should link to that user's voice posts (just like how on this forum I can see a members posts). This would allow users to quickly access their own ideas and see other interesting author ideas.
3. Attachments should be allowed. Sometimes it's easier to show then to explain something.

Plus it can be a lot more visually pleasing and convey the message better. We use screen shots all the time on this forum, the same could be done for voices.
4. Viewing new voices takes a lot more time than viewing new forum posts. This is because it tries to load all the posts all at once which not only takes much more time but I would assume uses a lot of StackIdeas bandwidth.
5. Separation between completed ideas and top ideas. For example is there is a highly rated idea called "groups", it should not only be marked as complete but should no longer display on the top list. The votes should remain, but it's silly to mix up completed ideas with popular ones. After all the popular list is meant to show people ideas that should be considered for the future. Having completed ideas in the mix clutters it and makes it harder to find the ones that actually need voting.
6. There isn't much feedback from the staff like there is in the forum. This makes it feel as if the ideas are not considered even though they might actually be. As a result people will be discouraged from using voices and see in the forums that something was at least looked at.

This might be one of those things that could be looked at once a week or once every few weeks.
7. A better editor. Not required, but it would be nice to have.

Links and such can go a long ways when referencing great ideas. Smilies make it more personal and theatrical. Bullet points are good for listing a number of reasons why something should be done in a certain way.