Just related to my 1-wire network I installed it here around 2005. I did go initially with a "star" topology versus a "linear" topology. But in the older home from the 70's I also used the 1-wire star topology for the all 2 wire sensors.
Due to the mixture of supply voltages (parasite powering) to the sensors I created multiple autonomous networks using Temp08's, Temp05's, 9097's (serial and USB). (I have multiple outside and inside 1-wire networks - a bit too much such that I have spreadsheets with addresses and locations today that I utilize.)
Today its become sort of a hybrid mix of star and linear.
BTW still have a few little miniature AAG combo temperature and humidity sensors in place that work just fine with only two wires and no extra voltages.
(Also have the newer AAG, combo HB and combo Midon sensors in place today).
I did start though by using cat5e and terminating all of the connections to standard network patch panels near the 1-wire devices. These all go to Digi Edgeports and Digi hubs today.
Personally never ran any of the 1-wire stuff on 22/4 or 22/2. I did use the old phone wires that were run in series in addition to the cat5 cabling I put in for the 1-wire stuff there...so I guess it wasn't at the time a pure star topology anyways. I am guessing with the 22/4 you would utilize devices that were all of the same voltages for the extra two wires eh? For the room sensors I used just typical RG-6 wall plate covers insulated with small telco exterior wall jacks with a bunch of holes in them. Not really nice looking for the combo sensors; but very functional. The HAI combo temperature and humidity sensors are larger. The externally connected to the Omnistat mounted on wall paintable temperature sensor are nice cuz you do not even see them and they use only two wires to the thermostat (think? forgot now).
I never did use any sort of shielded cabling for the 1-wire stuff. You could also utilize 2/4 wire microphone cable which is shielded. I ran some of that stuff here originally to provide remote audio stuff. (still noisy so most of it is not utilized today).
I did test and have in place today a combo chinese USB / serial 1-wire device with two mini stereo jacks on it. It came with standard stereo jack extension cords (shielded) with two 1-wire temperature sensors using same cabling and metal terminated temperature sensors. I do use it today in the mixture; but went to using my regular 1-wire sensors cutting the cables mostly.
You can go with a bit more high end 1-wire stuff from embedded data systems. I read that it works well; but it is much more expensive stuff to use.
http://www.embeddeddatasystems.com/
http://www.maximintegrated.com/app-notes/index.mvp/id/148
http://www.midondesign.com/Documents/1-WireApplicationGuide103.pdf
http://www.hobby-boards.com/store/pages/1%252dWire-Basics.html
).
