There's a newer version out now (Nescube 2.0 public beta) if anyone is interested.
http://rsm.pud.ru/?set=download&mc=1
Don't be put off if you don't read Russion. The actual emulator defaults to English. :)
To add you own roms:
1. Unzip the jar archive and navigate to the 'nes' folder
2. Move your games there
3. When you're done doubleclick the 'makefilelist.bat' file
4. Rezip the archive (giving it the extension jar) and transfer to your phone
You can change the options for display, orientation and !key mappings! once you start it. :)
Really nice! Much better than vNes