More good news for ecommerce.

Online sales yesterday increased 33% compared with a year ago, according to  IBM Corp.’s SmarterCommerce unit that tracks data from 500 retailers. Last year consumers spent a record-setting $1.03 billion online on the Monday following Thanksgiving weekend, which is also known as Cyber Monday, according to web measurement firm comScore Inc., which has not yet reported sales from yesterday.

“Cyber Monday was once again the big winner for the Thanksgiving holiday shopping season, with a record number of consumers focused on finding the best online deals,” says John Squire, chief strategy officer, IBM Smarter Commerce, the IBM unit that provides digital technology and services, including analytics data from Coremetrics, which IBM acquired last year. “Retailers that adopted a smarter approach to commerce, one that allowed them to swiftly adjust to the shifting shopping habits of their customers, whether in-store, online or via their mobile device, were able to fully benefit from this day and the entire holiday weekend.”

Shoppers’ buying habits did change this year compared with a year ago, according to Coremetrics. For instance, 10.8% of shoppers used a mobile device to visit a retailer’s site yesterday, up from 3.9% a year ago. That traffic corresponded to a growth in mobile sales, which increased to 6.6% of online purchases from 2.3% in 2010.

via Top 500 – Cyber Monday spending jumps 33% – Internet Retailer.