There is an icon in the deb file, but it does not show. It could be some setting on my device (I use categorize), but I doubt it. It shows up in the menu on your device?

Here is what I did to make it show on my device:
- Resized the icon to 64x64 and put it in /usr/share/icons/hicolor/64x64/apps.
- Moved mieru.desktop to /usr/share/applications/hildon (from /usr/share/applications) and changed the reference to the icon.

Now it shows the icon in the menu, but maybe it is a specific issue on my device after all.