As reported on streetinsider.com:

Sun Microsystems, Inc. (NASDAQ: JAVA) 14% HIGHER; expects Q4 revenue for of fiscal 2008 in the range of $3.725 to $3.800 billion, versus consensus estimate of $3.80 billion. On a non-GAAP basis, Sun expects to report net income per diluted share in the range of $0.25 to $0.35 versus analysts' estimate of $0.27.

The Sun stock price has jumped as much as $1.45 in after hour trading on the NASDAQ trading as high as $10.25 in response to positive Q4 preliminary results.   Currently trading at $9.88.

The graph below of after hour trading highlights the jump in share price.

Sun released PRELIMINARY results for 4th quarter after market closed last night (July 15) and despite very volatile market condition (Java closed @ $8.80 during normal trading hours), it was chased up to $9.94 in after-hours trade ...........

Sun Microsystems Inc. shares leaped after the networking products provider's earnings forecast came in better than expected by analysts. JAVA shares leaped 13% to $9.94 in heavy (after hours) trading after the company said it expects fourth-quarter revenue of $3.725 billion to $3.8 billion, compared with $3.835 billion in the same quarter a year ago. It forecast gross margin of 44% to 45%.