[cnavarro]

I was the first person to purchase the original wifi Rev hardware (from ElmCan) when it was released and the developer gave me a copy of the software. Through the few revisions that have been made, the bugs have been eliminated and with either an ipod touch or iphone, the Rev software and hardware package works great.

If you want something more full featured, the Rev hardware also works with Carcode Mueller's ScanTool software (which I also have).

As a datalogger, the cheapest* is the Innovate OC-1, but it is bug laden and very hard to get running *correctly*, but once working, it is great. *cheapest without the cost of a laptop to log the data.