The regular session's upward climb continued in post-market trading today as the usual tech suspects filled most of the ranks in relatively mild trading.

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The big percentage gainer tonight was the long-troubled Web site,

Priceline.com

(PCLN)

. An early morning ratings change from

Goldman Sachs

analyst Anthony Noto, lifting the stock to market outperform from market perform sent the beleaguered stock soaring a massive 35.9% during the regular trading day. An after-market announcement from the company only helped it to climb higher, when the company said that its first-quarter loss narrowed from the year-ago period and that revenues grew. The elevator ride to the sky continued in post-market trading as Priceline added another 12.4% to land at $7.41 on

Instinet

. On

Island

trading, Priceline added 13.7% to Priceline's regular day closing price.

Cisco

(CSCO) - Get Report

lead the way in volume traded on Instinet throughout the evening. The company posted gains of 1.4%, or 25 cents to $18.05 on Instinet trading. As the top volume trader on Island trading also for most of the night, Cisco climbed a slightly higher 1.6% to $18.08.

The rest of the top volume players in the after-hours scene were the usual guests at the tech party. Software makers came in a crowd, as

Microsoft

(MSFT) - Get Report

posted gains of 24 cents to $70.41,

Oracle

(ORCL) - Get Report

rose 1.3%, or 21 cents, to $16.25, and

Veritas Software

(VRTS) - Get Report

climbed to $67, a 1.5% gain.

Hardware names were also in the house, joining the upward trend, as

Sun Microsystems

(SUNW) - Get Report

rose 0.6% to $19.10 as one of the top volume traders.

JDS Uniphase

(JDSU)

and

Siebel Systems

(SEBL)

each gained 1% in the after-hours on Instinet, to $22.30 and $48.20, respectively.

Broadcom

(BRCM)

made the swing from initial after-hours losses to gains in the evening trading. Broadcom said yesterday that it was still working through its bloated inventory, but thinks that demand in the networking industry could return in the fourth quarter of this year. The stock gained both yesterday and today, and after slipping just a bit tonight, turned around to gain instead, rising 34 cents to $42.30 on Instinet.

But the evening shindig is never complete without a handful of downsiders hanging around, and tonight's crowd was led by mobile phone-maker

Nokia

(NOK) - Get Report

, which actually rose in share price during regular trading hours. Still, tonight saw its other side, as it fell 1.3% to $34.50 on Instinet as the second most actively traded stock. Nokia was not among the top twenty volume traders on Island.

Joining Nokia in the downside corner of the trading site was mobile telecom provider

Vodafone

(VOD) - Get Report

. Vodafone fell 2.2% to $28.50.

Island trading had a couple guests that haven't been regular attendees recently of the after-hours markets, but were making decent names for themselves in light trading. Internet consultant

CMGI

(CMGI)

jumped a sturdy 8.4% to $4.50 on Island trading, while Internet domain name registrar

Register.com

(RCOM)

rallied 10.3% to $8.36 after reporting a first quarter profit after today's market close.

This information is provided by Instinet, a wholly owned subsidiary of Reuters (RTRSY) . For further information, please contact Instinet at www.instinet.com.

Island ECN offers trading, mainly in Nasdaq-listed stocks, from 7 a.m. to 8 p.m. EST.

Confused?

TheStreet.com

explains how the rules change when the sun goes down in Investing Basics: Night Owl, a section devoted to after-hours trading.