It's been a mixed bag for IPOs this week. But, as for the MercadoLibre (NASDAQ: MELI)'s offering, things were certainly upbeat.

The IPO priced at $18 (at the top of the $16-$18 range) and raised a cool $332.8 million. So far, shares are trading up 38% to $25.

MercadoLibre operates the largest online trading platform in Latin America (which has about 550 million or so people). In fact, the region is experiencing high rates of internet penetration.

MercadoLibre has an assortment of services: product listings, which are based on either a fixed-price or auction-based format; classifieds; and secure payment solutions. There are more than 2,000 product categories, and the sites attract about 2.9 million listings per month.

The top-line growth has been impressive. From 2004 to 2006, revenues surged from $12.7 million to $52.1 million. During this time, operating expenses increased at a slower rate, going from $16 million to $46.7 million. In other words, the company is realizing operating leverage.

There is competition, such as from DeRemate and MasOportunidades.com. There is also pressure from large online communities like Google (NASDAQ: GOOG), Amazon.com (NASDAQ: AMZN), Microsoft (NASDAQ: MSFT), and Yahoo (NASDAQ: YHOO).

Also, eBay (NASDAQ: EBAY) owns roughly 19% of MercadoLibre. However, the strategic alliance has expired and eBay is now able to become a competitor as well.

The lead underwriters on the deal include J.P. Morgan Securities Inc. (NYSE: JPM) and Merrill Lynch (NYSE: MER).

You can find the prospectus at the SEC website. Also, if you want to check out more IPO pricings, click here.

Tom Taulli is the author of various books, including the Complete M&A Handbook and the EDGAR-Online Guide to Decoding Financial Statements.