Greetings, I have been working on a rather ambitious dimensional analysis framework and units of measurement library suitable for inclusion with the Boost libraries. The interface is probably quite different from anything previously seen but hopefully it is more intuitive, flexible, and...well...appealing. The design and implementation are still in flux but most of the functionality is in place. Several Boost developers have advised me to post it here to solicit comments and feedback. The "preview" release can be found in the Units folder of the Boost Vault. The filename is units-preview.zip. Some quick notes. The Tutorial section of the documentation is probably the most important and complete section. The header files contain only some of the most commonly-used units. Plenty more will be be added in the future. I would greatly appreciate questions, comments, and/or suggestions regarding the overall design and interface. I plan to keep working on this library until it is ready for a formal Boost Units library proposal. Thanks, Eric.