I would beg to differ FHC when you said "Same end.. different means"
I would say this because, the belief that Allah is above all is central to the Islamic Aqeedah (Creed). To believe that he's amongst us.. here there and everywhere is something that is frowned upon in islam.
You see, this belief can lead to practices that are completely alien to islam and the rise of actions that would shake the very foundation of someone's faith if they saw allah as being here there and everywhere.
For instance... Lets just say... over the course of 1000 years the thought patterns of the people where to go as follows;
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After 1 Year - Allah is everywhere
After 100 years - If Allah is everywhere then he's in this rock on the ground.
After 300 years - If Allah is in this rock in the ground maybe I can use it to help me concentrate during my prayer..
After 800 years - I'll carve a statue out of this rock and use it as a form of focusing my concentration on god.
After 1000 years - I'll worship this rock....
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That's one point of view...
another way of looking at this issue is this.....
"If Allah is here, there and everywhere, then that means that he is in the faeces that the dog left in the front lawn " NA AUDHU BILLAH!!! and surely our lord is not there.... besides to say that allah is above all else doesn't restrict him in anyway...
The above are just examples of what muslims think... but the thing that puts the nail in the coffin for us... and what seals our faith... is the fact that Allah told us so in the Quran.... In the verses mentioned in the above posts...
As for your question above.....
Allah refers to himself in the plural in many parts of the quran. this is what we call in islam "first person plural" It's a part of speech that indicates Majesty....
From the little reading that I have done, this form of speech is also not foreign to the kings of the past who would refer to tehmselves as "We"
Hope I cleared some things up FHC....
Hidaaya