As all things on demand continue to sizzle, hosted Web site search and content management vendor Atomz this week was acquired by Web analytics player WebSideStory.WebSideStory plans to expand its menu of offerings with Atomz’ lineup of on-demand services, which go far beyond search and Web CM. Atomz in the past couple of years pushed into catalog site search, marketing, promotions, and web analytics. Launched in 1998, Atomz was one of the first vendors to emerge from the ASP ashes with its hosted search service. WebSideStory also built its fortunes using the on-demand model for Web analytics. According to WebSideStory officials, the company plans to tie Atomz site search and CM to its HBX Web analytics service to create an integrated suite of on-demand digital marketing applications. The suite, to be called the Active Marketing Suite, will launch this summer. Technology Industry