"By 2011, the combined market share of the three major B2C e-commerce markets — the UK, Germany and France — will drop slightly as smaller, second-tier markets provide a new wave of growth," said Jeffrey Grau, eMarketer Senior Analyst. "Further out on the horizon, a third wave of growth will center on Eastern European countries as they begin embracing e-commerce."

Meanwhile, in the rest of Europe, Internet penetration varies by country. According to comScore World Metrix, the Netherlands and Nordic countries are the highest Internet-penetrated in Europe.

"Of course, it must be remembered that in terms of total Internet users, those countries are dwarfed by Germany, the UK, France, Italy and Spain," Grau said.