Sirius Satellite Radio (NDAQ: SIRI) and XM Satellite Radio Holdings (NDAQ: XMSR) drew one step closer to consummating their planned merger yesterday after a key U.S. regulator expressed support for the 16-month-and-coming deal. FCC Chairman Kevin Martin confirmed published reports that he would support the transaction provided that the companies agreed to a series of conditions.

There had been concern that the merger between the two satellite radio giants would eliminate the possibility of any competition and create a monopoly. As a result, the companies are being forced to agree to a series of conditions including making 24 radio channels available for noncommercial and minority programming. In addition, the companies have to cap prices, provide interoperable radios and offer programming on an a la carte basis.

Martin's decision will likely remove the last remaining regulatory hurdle in one of the most length and heavily criticized decisions in the history of M&A. The Justice Department has already stated that competition from traditional and high-definition radio, iPods and MP3 players already presented a clear competitive environment. As a result, the merger no longer faces any antitrust hurdles.

Shares of both companies rose on the news.

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Yahoo Inc. (NDAQ: YHOO) shares dropped off a cliff today after the search company shunned Microsoft Corporation (NYSE: MSFT) completely in favor of a deal with Google Inc. (NDAQ: GOOG) instead. Management may have finally found a way out of the situation, but shareholders clearly disapproved of the new deal. Shares plummeted nearly 5 percent on the news as a Microsoft deal is now completely out of the picture.

The only hope remaining for some shareholders is Carl Icahn's continued involvement. The activist shareholder had been pushing for a deal with Microsoft and even nominated his own directors to the board in order to effect change. The aging investor isn't known for giving up either, so it should be a fight until the end. Investors don't have to look back too far to see that fact- he had to try twice to effect change in Motorola!

However, the fact remains that most proxy contests end up failing. Moreover, Microsoft has not indicated that it would still be interested in a deal even if Icahn did take over the company. The only thing that is for certain is that the Google deal would be voided if Icahn does win control over the search giant. This fact could put a strain on his popularity with institutional investors as a loss of a Google and Microsoft deal would put Yahoo back to step 1.

In the end, it is no secret that Yahoo needs to change something in order to get itself out of its current lull. Management believes that a partnership with Google would help increase its revenues. Shareholders believe that a sale to Microsoft represents the bet immediate solution. Overall, it looks like Google is the only clear winner as it has now secured a deal with Yahoo while also eliminating any deal with Microsoft that could boost its competition.

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Citigroup Inc. (NYSE: C) chief executive Vikram Pandit announced plans today to shut down Old Lane Partners. This was a hedge fund group that he co-founded and sold to the bank last year for more than $800 million. A regulatory filing showed that the bank took a first-quarter charge of $202 million to write-down the value of its investment in Old Lane, which contributed to its $509 million hedge fund unit loss during the quarter.

Ousted chief executive, Charles Prince, called the transaction "an investment as much as it is an acquisition" last April when the deal was completed. Many saw the deal as a way to recruit Pandit as well as John Havens, who was promoted in March to head of investment banking, trading and hedge funds. It turns out that the deal wasn't a great investment or acquisition as Citigroup took a dive as a result of hedge fund losses.

At least shareholders can be sure they weren't scammed. Pandit may have received $165.2 million last year for his stake in Old Lane, but he reinvested $100.3 million, after tax, into the fund, according to a regulatory filing. This means that he is on the hook for just as much of the losses as many of the other investors. It appears that this was simply a case of poor timing for Citigroup and poor asset investment choices by Old Lane.

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