Maybe I do not fully understand your problem, but you know you can move the screens physically right?

and if this is not possible you can change the screen layouts in system prefs/Displays/arrangement as you can see from screenshot (white bar equals menu and dock screen) you can also move the menu bar and drag it to the middle monitor

thus moving everything into the middle.
Yes, you are not understanding the problem.
Let's say you have multiple monitors -- but to illustrate the problem let's say 3 arranged horizontally such as someone with an ATI Eyefinity capable card would be apt to do
Let's say monitor 1 is primary (yes I know I'd probably make #2 the primary but bear with me). The dock and system menu are on monitor 1.
Now let's say I am running Microsoft Word or Photoshop or whatever you would like on monitor 3.
EVERY time I need to use the menu I need to mouse over to monitor 1 and then back to monitor 3 for the app. Same if there is something on the dock jumping up and down like a Jack Russel Terrier or I need the trash. I know someone will say "keyboard shortcuts" but not every menu function has a keyboard shortcut.
Of course, at least as far as the menu goes, this stems from Apple's age old disembodiment of the menu from the application window. Other GUIs like Windows don't have this problem because the application menu stays with the application, it isn't disembodied and locked to the top of display 1. Of course Apple violates its own design with toolbars because toolbars are just shortcuts to menu items too but they stay with the application window not the system menu. IMO this all goes back to needing a system menu and the original Mac had only 512x342 so they probably decided they would save screen real estate by forcing every menu to appear at the top only and it would switch context, as opposed to a system menu and an app menu both taking up space.
I have "only" 2 monitors, one a 30" cinema display and the other a 24". I generally put long term "back burner" stuff on #2, but anytime I try to actually use an app on #2 it is frustrating. Especially when you go from the lower right corner of #2 to the upper left corner of #1 for the menu.
I know your pain, but this may help.
http://blog.boastr.net/?page_id=79
Puts a second menu bar on your second monitor. Not sure if it works across 3 though.
Very cool, I'll give it a spin. Thx