TS3680 My iMac is locked on a gray screen, no apple logo or anything else shown, and the Command+Control+Esc option does nothing....help!

After a recent login, my iMac 27" has locked up with a gray screen.  Cursor is visible, and moves, but I cannot get anything to actually open and the login screen does not appear.  I tried the command+control+esc option, in an attempt to force quit / restart, but nothing happens.

See if this helps
http://macs.about.com/od/MacTroubleshootingTips/tp/Top-10-Troubleshooting-Tips-F or-Mac-Startup-Problems.htm
Especially tips 2 and 4.

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    [Topic : kmosx: Kernel Panics? Don't panic too !|http://discussions.apple.com/thread.jspa?threadID=121923]
    [X-Lab: Resolving Kernel Panics|http://www.thexlab.com/faqs/kernelpanics.html]
    [Tutorial: Avoiding and eliminating Kernel panics|http://www.macfixit.com/article.php?story=20060911080447777]
    [Tutorial: An introduction to reading Mac OS X crash reports|http://www.macfixit.com/article.php?story=20060309075929717]
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    Message was edited by: ao71

    Take a look at these 2 articles: Startup issues
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