I just released something this year that you may be interested in. You can see my website here: http://www.ageeracetiming.com/about/
Watch videos to see how the system works here: http://www.youtube.com/user/brianagee127
As most people know, chip timing companies take off the shelf equipment and they tripple the price and then make it so that their software only works with that equipment - and then they charge you hundreds of dollars a year in maintenance, support, or upgrade fees. Also, professional race timers are too expensive for the average race that can expect well under 1,000 participants. So, as a runner, occasional race director, and long-time software developer I decided to make chip timing affordable for everyone - meaning that race directors can time their own races and that people can start their own race timing business (therefore reducing the price directors have to pay because of increased competition).
The total cost for the average RFID system that people buy from me is around $2,300 and it includes a 4-port RFID reader (Motorola FX7400), a USB powered/operated backup RFID reader (Thinkify TR200), 5 antennas, and the software that controls it all and times your race(s).
Check it out and let me know if you have any questions. I developed this so that it's as easy to use as possible. You can buy all of the equipment from wherever you can find it at the lowest price - so you may spend much less than $2,300. Also a new 4-port reader is coming out next month that is supposed to have amazing performance and cost "$550ish" and I'm supposed to be on the first to get it so that I can offer it to the race timing market. This means that the cost for a 5 antenna system will be around $1,800. Pretty amazing when you consider that a near identical system (and theirs doesn't have a backup RFID reader!) cost $12,000.