I've got some suggestions as well:
(1). A "Jump to Next Silence" button, which would jump to the next section of silence in the video. It would probably be good to let the user enter the minimum silence as well. e.g. 100 millisec.
(2). The ability to see the audio track profile.
Both of these features are very useful when editing video, and especially when removing TV ads.
Here's a screen shot from Camtasia which shows the audio track and the gaps between the TV ads:
I'm not sure how far you want to take this great program, but there's no harm in suggesting:
(3). Video conversions (AVI, WMV, MP4, FLV), resolution and quality changes, etc.
(4). Special effects: fade in / fade out of video and/or audio, cartoonize, black and white, halo, fisheye, etc.
The last 2 suggestions are almost certainly way off the mark. They go way beyond what a video splitter should do.
Still, no harm in suggesting ...
Moose