Los Angeles-based PC postage firm Stamps.com is ramping up its efforts to get more of the eBay postage market, saying today that it has integrated its latest version of software with Auctane Shipping Manager, a software program used by eBay users to manage their auctions. According to Stamps, the integration allows users to print all classes of USPS postage through eBay com. The integration deal comes shortly after Stamps.com launched a promotion last week to try to attract more eBay sellers to the service.