UPDATE 2-Cyber Monday sales best ever, for Amazon's Kindle too

* Cyber Monday sales up 30.3 percent over 2011 - IBM * Amazon says its Kindle devices had biggest sales day ever * ChannelAdvisor says client sales growth stronger on eBay than Amazon By Alistair Barr Nov 27 (Reuters) - Internet sales jumped more than 30 percent on Cyber Monday, making it the biggest online shopping day ever, according to data released on Tuesday. Monday was also a record day for sales of Amazon.com Inc's Kindle devices, the online retailer said, without