|Very similar to GIMP GUI, but better Adobe "looking" menus, etc..|
But I don't think GIMP will ever do that for us!, I don't blame them actually. They just can't!. Think about it, if they do so, they they'll lose the respect, all their efforts for creating an amazing image manipulation suit, but at the end some could accuse them of "copying" Adobe!.
So as most, I too understand the issue from their perspective. But that's not to say that you can't customize GIMP and create a GUI that is very similar to the Adobe photoshop which should help the "migrating" users as well.
That's exactly what the GIMPshop developers has done. The GIMP-shop come with all the features of GIMP and a GUI that is very very similar to the Adobe suit... how that for a change ;-). So, I'm not going to write a long list of its features since if you know GIMP then you almost all about GIMPshop as well.
Anyhow, if you want to know how to install it in Ubuntu, then first download the .deb package from here.
Now simply double click on the .deb package and follow the instructions on the GUI window. Or, open your Terminal and change the directory to the extracted location (your "Home" folder or to "Desktop" for instance) and issue the below command.
sudo dpkg -i gimpshop_2.2.11-1_i386.deb