Updated from 12:46 p.m. EDT

Technology stocks moved higher Friday, but several names bucked the trend after offering disappointing earnings guidance.

RightNow Technologies ( RNOW) shares slumped 17% after the software company posted better-than-expected first-quarter results, but warned that second-quarter revenue would be below Wall Street's forecast. The company reported an adjusted loss of $4.7 million, or 14 cents a share, on revenue of $25.7 million. Analysts polled by Thomson Financial expected a bigger loss of 19 cents a share on revenue of $24.7 million. During the year-earlier quarter, the company earned $343,000, or a penny a share, on revenue of $24.6 million.

Looking ahead, RightNow sees an adjusted second-quarter loss of 11 cents to 13 cents a share on revenue of $26.3 million to $26.8 million. Analysts project a loss of 12 cents a share on revenue of $27.9 million. Shares closed down $3.07 to $14.99.

Elsewhere, Stamps.com ( STMP) tumbled 16.1% after the online postage company posted mixed first-quarter results and issued full-year guidance that disappointed investors. The company posted adjusted earnings of $3.5 million, or 16 cents a share, on revenue of $20 million. Analysts expected a smaller profit of 14 cents a share on higher revenue of $21.6 million. During the year-earlier quarter, the company posted earnings of $3.4 million, or 14 cents a share, on revenue of $20.5 million.

Looking ahead, Stamps.com sees 2007 adjusted earnings of 77 cents to 87 cents a share on revenue of $87 million to $97 million. Analysts project earnings of 86 cents a share on revenue of $95.5 million. Shares closed down $2.47 to $12.88.

Bell Microproducts ( BELM) rose 9.3% after the computer-products distributor said it anticipates better-than-expected first-quarter revenue. The company sees revenue of $990 million to $1.01 billion, an increase of at least 14% above last year's first-quarter revenue of $867 million. Analysts project revenue of $979.7 million. "We are pleased with our strong revenue growth again this quarter," the company said. "Our international businesses in Europe and Latin America performed well in the first quarter and both generated double-digit revenue growth." Shares closed up 60 cents to $7.05.

Meanwhile, shares of Sirf Technology ( SIRF) slid 9.7% after the maker of chips for GPS systems posted first-quarter earnings that fell short of expectations and warned second-quarter revenue would be below Wall Street's forecast. The company posted adjusted earnings of $12 million, or 21 cents a share, on revenue of $67.3 million. Analysts expected earnings of 22 cents a share on revenue of $67.2 million.

Looking ahead, Sirf sees earnings of 23 cents to 25 cents a share on revenue of $69 million to $72 million. Analysts project earnings of 25 cents a share on revenue of $74.6 million. Shares closed down $2.78 to $25.85.

As for the broader technology sector, the Nasdaq 100 was up 13.42 points to 1845.89.

Other technology movers included Intel ( INTC), up 35 cents to $22.16; Microsoft ( MSFT), up 33 cents to $29.02; Cisco Systems ( CSCO), up 31 cents to $26.99; Oracle ( ORCL), up 24 cents to $19; Level 3 Communications ( LVLT), up 17 cents to $6.12; Sun Microsystems ( SUNW), up 4 cents to $5.93; and Sirius Satellite Radio ( SIRI), which was up 1 cent to $2.99 earlier in the day but closed flat at $2.98.

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