The Palo Alto, Calif.-based company helps brick-and-mortar retailers track shopping behavior by putting sensors in their stores; the sensors pick up Wi-Fi signals from smartphones.

Euclid has raised $5.8 million in capital, led by New Enterprise Associates with Harrison Metal, Triple Point Capital and other investors also participating.

Euclid’s CEO Will Smith said the system tabulates anonymous foot traffic and collects the data on a dashboard, where retailers can track loyalty by a phone’s unique user ID.

Challenged with the suggestion that most people turn off Wi-Fi on their devices to save battery life, Smith disagreed. “It’s accurate,” he said, adding that the sensors can even tell whether someone is entering the store, or just walking by.

The system cannot collect any information on a person and can’t communicate with them. But it can track whether the same person visited a coffee shop in the morning and returned for lunch in the afternoon.

The company’s COO, Scott Crosby, is the co-founder of the original Urchin team that was acquired by Google in April 2005, and which became the basis for Google Analytics.

Not many online videos have sequels, but the one below–featuring a passel of celebrities, including Tom Cruise, Will Smith, Borat, Leonardo DiCaprio, Julia Roberts, Justin Timberlake, Scarlett Johansson and Harrison Ford–is one and even has famed director Steven Spielberg at the helm.

It is a follow-up to a PSA I posted earlier this month called “Hollywood Declares Themselves,” encouraging young people to vote.

It is from the nonpartisan group Declare Yourself, which has also put out the “Muzzler”/Jessica Alba get-out-the-vote advertising and video.

Declare Yourself is partnering with Google, YouTube and MySpace to distribute the new video, which has been produced by DiCaprio’s Appian Way .

Declare Yourself claims that “since it first debuted on Oct. 1st, the PSA has been viewed over 5,000,000 times. According to all major voting registration sites, including Google, Rock the Vote, and Declare Yourself, over 300,000 new voters registered due to the video alone.”

Here is the new video and also the previous two under it:

Spielberg Directs!

Hollywood Declares Themselves

“Muzzler”/Jessica Alba

This morning PluggedIn Media launched a new service for streaming HD-quality music videos. Backed by Overbrook Entertainment–Will “Gettin’ Jiggy Wit It” Smith’s production and management company–PluggedIn will offer some 10,000 videos from EMI (EMI.L), Vivendi (VIV.PA) and Sony BMG (SNE), along with the standard music-site fare–artist bios, users playlists and whatnot. That being the case, how does PluggedIn hope to differentiate itself from the competition? “We look at all the changes shaping online entertainment and see massive opportunity for lots of companies to appreciate and forge really viable consumer connections,” said CEO Jeff Somers. “We think what will separate us from what is out there today is an unbelievable high-quality viewing experience, matched with in-depth content and community tools.”

Perhaps. But it will also create dangerous rivalries with some powerful competitors. With its social-networking features, PluggedIn will soon find itself in direct competition with MySpace Music (NWS) as well as Hulu (GE).

This morning PluggedIn Media launched a new service for streaming HD-quality music videos. Backed by Overbrook Entertainment–Will “Gettin’ Jiggy Wit It” Smith’s production and management company–PluggedIn will offer some 10,000 videos from EMI (EMI.L), Vivendi (VIV.PA) and Sony BMG (SNE), along with the standard music-site fare–artist bios, users playlists and whatnot. That being the case, how does PluggedIn hope to differentiate itself from the competition? “We look at all the changes shaping online entertainment and see massive opportunity for lots of companies to appreciate and forge really viable consumer connections,” said CEO Jeff Somers. “We think what will separate us from what is out there today is an unbelievable high-quality viewing experience, matched with in-depth content and community tools.”

Perhaps. But it will also create dangerous rivalries with some powerful competitors. With its social-networking features, PluggedIn will soon find itself in direct competition with MySpace Music (NWS) as well as Hulu (GE).