Shares of

VitalStream

(VSTH)

were among technology's winners Thursday, soaring 20% after the provider of audio and video streaming services agreed to be acquired by

Internap

(INAP) - Get Report

for about $217 million in stock.

Internap will issue about 11.9 million shares to VitalStream, representing about 26% of the combined company's shares. The deal, which is expected to close during the first quarter of 2007, will be slightly dilutive to Internap's earnings in 2007, but will add to earnings beginning in 2008. Shares of VitalStream were trading up $1.29 to $7.69; shares of Internap fell $1.49, or 9%, to $15.56.

Systemax

(SYX) - Get Report

tumbled 16% after the computer hardware distributor further delayed the release of its second-quarter results. The company said that it is "working diligently" to complete the report. On Aug. 29, the company said that it would post second-quarter results in about six weeks. Shares were down $2.37 to $12.67.

Shares of

Cypress Semiconductor

(CY) - Get Report

slipped 3% after the chip company said that it received notification that the Department of Justice plans to launch an investigation of the SRAM market. Cypress said it will cooperate fully with the DOJ's antitrust division. Shares were trading down 53 cents to $19.59.

Compuware

(CPWR)

fell 3% after the software maker gave a second-quarter preview that fell short of Wall Street's forecast. For the quarter ended Sept. 30, the company expects to post earnings of 7 cents a share and revenue of $288 million. Analysts polled by Thomson First Call expect earnings of 8 cents a share on revenue of $300.9 million. In May, during Compuware's first-quarter earnings conference call, the company said its second quarter would be "challenging," but said that second-half results will show greater strength. Shares were trading down 34 cents to $7.61.

Shares of

Cabot Microelectronics

(CCMP) - Get Report

declined 3% after the company lowered its fourth-quarter gross profit margin forecast. For the period ended Sept. 30, the company now sees gross profit margin of 44% to 45%, down from an earlier view of 46% to 50%. The company also projected revenue of $86 million to $87 million. Analysts forecast fourth-quarter earnings of 41 cents a share and revenue of $88.7 million. Cabot plans to issue fourth-quarter results on Oct. 26. Shares were down $1.13 to $30.12.

Other technology movers included

Sun Microsystems

(SUNW) - Get Report

, up 6 cents to $5.04;

Microsoft

(MSFT) - Get Report

, up 45 cents to $27.99;

Intel

(INTC) - Get Report

, up 31 cents to $21.20;

Applied Materials

(AMAT) - Get Report

, down 25 cents to $18.37;

Sirius Satellite Radio

(SIRI) - Get Report

, down 3 cents to $3.76;

Oracle

(ORCL) - Get Report

, up 15 cents to $18.73;

Cisco Systems

(CSCO) - Get Report

, down 5 cents to $24.35;

Lucent Technologies

( LU), up 3 cents to $2.32; and

Apple Computer

(AAPL) - Get Report

, up $1.35 to $74.58.