Editor's Note: In this feature from Stockpickr, we highlight lists of stocks that have been upgraded by analysts or are experiencing activist investor situations or some other market-moving events.

Rumors of the Day

: According to a report in today's

Wall Street Journal

,

Microsoft

(MSFT) - Get Report

is in talks about making an investment in Facebook.com. The investment could value the social-networking Web site at more than $10 billion. Microsoft shares added 42 cents, or 1.4%, at $29.50.

Deutsche Bank upgraded

Westwood One

( WON) from hold to buy but lowered its price target from $4 to $3.50, saying its profile makes it a likely takeover target. Deutsche Bank cited, "1) likely new CBS deal, 2) feasibility of sale to private equity and 3) signs that at least the network business (45% of revenue) is turning up." The upgrade sent shares higher by 17 cents, or 5.7%, to $3.15.

Today's Hot List

:

Lennar

(LEN) - Get Report

delivered a steep third-quarter loss Tuesday. The homebuilder lost $3.25 a share; analysts were expecting a 55-cent EPS loss. Revenue fell 44% to $2.34 billion, slightly shy of the $2.39 billion consensus estimate. Lennar CEO Stuart Miller said, "It is already well documented that the housing market has continued to deteriorate throughout our third quarter. Heavy discounting by builders, and now the existing-home market as well, has continued to drive pricing downward." Shares fell $1.01, or 4.2%, to $23.17.

Lowe's

(LOW) - Get Report

said drought conditions in the mid-Atlantic, Southeast and West regions of the country have negatively impacted the performance of outdoor product sales. The company now expects to deliver earnings for the fiscal year at the low end or slightly below its prior guidance of $1.97 to $2.01. The Wall Street consensus is $1.99. Shares dropped $2.06, or 6.7%, to $28.49.

Analyst Downgrades

: Friedman, Billings Ramsey downgraded

Arris

(ARRS) - Get Report

from outperform to market perform and lowered its price target to $15. The firm said Arris'

C-COR

( CCBL) purchase will likely dilute near-term earnings, which should hang over the stock for the next few quarters. Arris shares sunk 40 cents, or 3.3%, to $11.58.

Analyst Upgrades

: Robert Baird upgraded

Briggs & Stratton

(BGG) - Get Report

from underperform to neutral and raised its price target to $29. The stock is down 20% since earnings and is already beginning to reflect lower consumer spending. Shares are down 16 cents, or 0.6%, at $25.88.

Latest Activist Situations

: According to StreetInsider.com's 13D Tracker page, Stadium Capital Management -- an 11.4% shareholder in

Rural Metro

( RURL) -- sent a letter to the company's board of directors "expressing their dissatisfaction with RURL's delayed securities filings, inadequate investor communication by RURL's management and the inappropriate delay of the 2007 annual meeting of stockholders until February 2008." In the letter, which was disclosed in a regulatory filing, Stadium urges the members of the board to either explain its plan, bring in new management or pursue a sale of the company. Shares of the micro-cap medical transportation company fell 10 cents, or 3.1%, to $3.10.

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