-- Save me in ~/Library/Application Support/iTerm2/Scripts, then restart iTerm2 and find me in the Scripts menu
set hostnames to {"foo1.bar.baz", "foo2.bar.baz", "foo3.bar.baz", "foo4.bar.baz", "foo5.bar.baz", "foo6.bar.baz"}

tell application "iTerm"
    activate
    create window with default profile
    tell current tab of current window
        select
        tell current session
            write text "ssh " & (item 1 of hostnames)
            set lower to split horizontally with default profile
            set num_hosts to count of hostnames
            repeat with n from 2 to num_hosts
                if n - 1 is (round (num_hosts / 2)) then
                    select lower
                    write text "ssh " & (item n of hostnames)
                else if n > 1 then
                    set new_split to split vertically with default profile
                    tell new_split
                        write text "ssh " & (item n of hostnames)
                    end tell
                end if
            end repeat
        end tell
    end tell
end tell