Here's my list of suggestions, it looks more like a personal wishlist, although many developers may find these useful.
- RSS feed
- Categories (or even better: tags)
- Ability to order by uploader, creation time (so all the infos might be put into CSort )
- Showing the appropriate tutorials in the documentation (guide, api). Tutorials can also link to each other.
I know, implementing these features won't get #1 priority, but they should be considered. It would have great impact on the community growing around Yii.