An online coupon sent via email from Groupon is pictured on a laptop screen November 29, 2010 in Los Angeles. REUTERS/Fred Prouser

Daily deals website Groupon, which last year turned down a $6 billion bid from Google, has held talks with banks about an initial public offering that would value the company as high as $25 billion, according to Bloomberg.

The Chicago-based company ballooned to 50 million users in 2010 and is available in 500 cities in 40 countries. Not bad considering the two-year-old start-up was valued at $1.3 billion just last April.

Shira Ovide of the WSJ.com wonders if Groupon’s massive valuation, coupled with the reported $75 billion worth for Facebook, has the makings of another 1990′s tech bubble.

The majority of Vimpelcom shareholders voted for a deal that will involve taking on $20 billion of debt and diversifying into new markets, allowing it to claim victory in its long-running battle for control of Wind Telecom.

Norway’s Telenor, which has a 36 percent voting stake, had fought a battle with fellow major Vimpelcom shareholder Alfa Group to have it blocked. But the more than $6 billion cash-and-shares bid for control of Orascom Telecom and Italian group Windis is expected to complete in the first half, subject to regulatory approvals and financing.