Guess I had to fix my own problem ... :) Turns out that there was a cooling fan that wasn't functioning (spinning).  I removed the fan, reseated it and it immediately started right up.  The machine then booted normally .... go figure.  So I guess this would cause the machine to hang on boot apparently.  Why not just give me a warning message?  Why screw up my whole day!  Damm!
I have a DELL Poweredge 2600 running Windows Server 2008 (this is a production machine), the machine rebooted on its own, I assume because of an update from Microsoft, but I really don't know.  Once I noticed the machine was down, I checked it and found that it was hung about 1/3 of the way thru the dell boot progress bar.  I turned the machine off and on again, it booted past the dell boot progress bar, but gets hung on the windows boot progress slide when keeps going back and forth, every once or so often pausing for a few seconds.  I tried to boot into safe mode, but the machine hangs after loading crcdisk.sys.  I ran a consistency check on the raid array using the utility that came with the machine (on the perc controller), but no errors found.  For some reason I cannot boot off the CD ROm (yeah I know, separate issue), so I can't use the CD to get into recovery mode (yet).  If anyone has any ideas or first hand knowledge on how to solve this issue besides a wipe and rebuild, I'd appreciate hearing it.  Thanks in advance.   Prescott ....
Boot hangs on crcdisk.sys