The boys over at DigiTimes have some information on Intel's Merom processor. The chip will be pin-compatible with Yonah and feature an L2 cache of up to 4MB. Merom will also feature a 14-stage pipeline and is built on a 65 nanometer manufacturing process:

First mentioned by sources in 2004, Merom was announced by Intel in August this year at IDF Fall in San Francisco. The processor will be manufactured utilizing 65nm technology. Compared to Yonah, it will have a larger level-two cache (presumably up to 4MB) and will contain some micro-architecture innovations, according to Eden. One of these innovations will be a higher performance 4-issue out-of-order engine with deeper buffers and a pipeline extended to 14 stages.

This news article was written on October 20, 2005, quoting DigiTimes.