Well, you beat me to posting my own maps by about two hours. Never mind, I only spent a whole week on them. 
Ah well, here's a closer-up of the Las Vegas metro area:
(click for bigger version)
And an unshaded version that's a little easier on the eyes:
Hopefully it won't take a genius to figure out where the wealthy gated communities of suburbia are located. Hint: they're dark green.
The north-south strip of Paul territory in the center of the city is indeed The Strip, which makes me smile. Alas, I wouldn't read too much into that though, as it's (obviously) not a residential area, and thus there were half a dozen total votes in each of those precincts.
The wild variance you see in some parts of town is simply due to them having low Republican populations. The bloc of empty precincts in the northern side of town is predominantly black, and the empty bloc on the southern end of the Strip is the airport and some undeveloped light industrial areas.
Essentially, Romney won pretty much every precinct that had a high turnout/GOP population. I was surprised by this too.
And lastly, despite winning only 69 votes statewide in total, two precincts in the city actually managed to see a majority of votes for 'None'. They each had about a dozen voters, so there must have been some type of co-ordinated effort, or perhaps just a thoroughly uninspired group of voters who still managed to turn out anyway.
