Cadence computer - I have a Cateye Astrale 8 on my bike - rear wheel pickup for cadence and it was easy to install (I installed on one a friend's bike too). They cost <$40 at the LBS and cheaper on-line. It's a very straightforward computer - cadence, current speed, max and avg speed, clock and ride time. I use it side by side with my fancy-schmancy Polar S725X (which I still forget at least every ride to stop or start, so my trusty Astrale is where I turn for the ride numbers after every ride!) I have found that by keeping the Astrale display on cadence, I really pay attention to it when I ride, and I think my cadence and riding have improved as a result.

My dream... well my first and foremost dream is to ride the Trans-Canada Trail. It's a trail that runs throughout the entire country and is made up of old defunct railway lines. At the current time it is approximately 10,077 km long(one way).
Have you been over to bikejournal.com? There are many of us here that are members over there too, and I am participating in a virtual ride across Canada (VCAN) on the Trans-Canadian Highway - you might want to check it out - look for the VCAN thread on the forum - its a fun way to put my regular local ride miles to a more exotic purpose!

Welcome and have fun!