All those users are part of the UNIX heritage of OS X. They are all normal. Some processes run as their own user for security purposes since you can restrict user accounts to be able to access only a small area on the hard drive. Many things need to run as root to give them higher access...
This might be the way to enable the 64 bit kernel
To try to boot x86_64 kernel on Macintosh, edit this file:
/Library/Preferences/SystemConfiguration/com.apple.Boot.plist
find there:
<key>Kernel Flags</key>
<string></string>
and change it to
<key>Kernel Flags</key>
<string>arch=x86_64</string>...
The new icon happened a while ago but not all computers it seems. My 10.5.7 still has the incandescent bulb icon
http://discussions.apple.com/thread.jspa?messageID=9483222
The first preview of 10.6 was last summer at WWDC. They gave out pre-release copies of an early build and have been seeding it to ADC members for a while. I'm guessing it'll be complete by WWDC this year which is June 8-12.
Try changing "localhost" to "127.0.0.1" instead. I've noticed that using just localhost tries to use the socket file which is in a different place than what PHP expects so changing it to an actual IP address forces it to connect over TCP instead.
Some laptops have the rotating screen that can close and turn the computer into a tablet basically. Those are pretty cool but really only useful if you are an artist or want to write with a stylus. I can't really see myself using it but I wouldn't say no to one if it ever came out from Apple.
kABHomeLabel is not a supported value to pass to ABMultiValueCreateMutable.
See the documentation within XCode and specifically you want to pass in one of these values:
Record Property Types
These constants identify record property types.
#define kABMultiValueMask (1 << 8)
enum {...