Add advanced details area (show chunk view, peer view, file view, statistics view etc...). Use tabview to display multiple views.
Add a coloured band over the mainview displaying the currently display items. For example if I select "Downloads" from the sidebar it should display "Downloads". If instead I select a specific group <groupname> it should display "Downloads - <groupname>"
Add valid download time frame, global or individual.
Show average transfer speed when finished
Re-import the sidebar. Might be a tree-view.
Add a "Finished" item. This will point to the downloaded files.
Add a popupmenu to add or delete groups by right-clicking on them.
Implement the selection of a specific group. In this way selecting a group from the sidebar should display only its transfers.
Make the sidebar capable of several sizes for its items (16, 22, 32, ...)
Show downloading progress, if multiple downloads are going, show each for 1 or 2 senconds.
Implement progressive filling of the icon in the system tray.
Use KPassivePopups to notify when all the transfers have been downloaded.
Ask the user if he/she wants to delete the transfer (or probably if he/she wants to delete the tmp-file)?
Let the user add new download-sources to a multithreaded transfer manually
Handle the situation when we remove a group which has transfers.
If user resume a download and find the disk space is not enough, implement a option which can move and continue the transfer to another user-specified place.
Add a wizard on the first app execution, where the user can set his download folders and other "vital" settings like the integration with Konqueror. Perhaps we could provide a good default like ~/downloads/.
Check there is enough space left before downloading file
Proxy-support, not global, only for kget (we need to wait for kdelibs)
Right-click menu to change transfer properties (filename, destination directory, url)
Move deleting of big tmp-files to a new thread.
Profile kget and look for possible optimizations.
Make KGets handling of many downloads smarter, (maximum number of open connections per server).
Recursion and other wget features.
Save referer page for downloads.
Preserve timestamp of downloaded files (as option)
Fix thread related issues.
Polish youtube downloader.
Prepare to write megaupload/rapidshare downloader.