San Jose-based Interwoven said Thursday that it has closed on the acquisition of Optimost LLC, a provider of web site optimization software and services. The deal was worth $52M in cash, and assumption of certain employee stock options. According to Interwoven all Optimost employees have joined the firm. Interwoven said that it expects the acquisition to contribute $1.5M to $2.0M in total revenue during Q4 of 2007. Interwoven announced the acquisition of New York-based Optimost in October.