I just added 18 track maps thanks to Jerry Austin of Austin Motorsports.
I recently saw this book by Neil Roberts. Looking at Amazon, there are some pretty experienced people with great things to say about it. Check it out.
For a neat little logger, take a loot at the GPX Pro recently added to the data systems page at http://www.xtracing.com/en/gpxpro/index.php
Under the vendors page, I just added Raetech - a supplier of load cells in a number of really cool configurations. Check it out.
I just added the Rumble Strip Racing and Torque App to the data systems pages.
More importantly, I just added a number of programs under the "Video Overlay" menu that allow you to overlay your data over video fro
I added a link to a really cool review of Android Smart Phone Apps for data logging on the blog www.onehotlap.com. Check out the review and the blog. There is some great stuff there.