The Jerusalem trail goes through major touristic attractions in Jerusalem. It connects to the INT at the Sataf and Ein Hindak. It is approx. 40 km (25 miles) long. 

From the INT at the Sataf to: Mt. Harat, Maoz Zion (Mevaseret), Moza, Nahal Soreq, Lifta, Jerusalem, Mt. Scopus, Mt. of Olives, Silwan, Jerusalem, Emeq Refaim str. , President's house, Rehaviya, Kenesset, Hebrew University, Beit Hakerem, Hertzl str., Mt. Hertzl (near Yad Vashem),  Ein Karem, Hadassa trail, Ein Hindak and connects to the INT.

The Jerusalem trail with 15:000 city maps and 1:50,000 topo maps is included in the 2nd edition of the INT guide 2011.

The second edition of the INT guide (in English) will be available in spring 2011 .

ashen yashen wrote     May attempt it all in one day.

 I was thinking just the opposite.  Using it as a diversion off of the INT and hiking it in 3 to 7  days (with possible diverisions off of it).  While I guess it is doable in one day, but you have even less time to see the various sites along the way than someone on a half day bus tour of the city.  In my one visit to Israel, I have already done "Israel as seen from a tour bus window."  My plan, particularly in the North, is go very slow and get to see the country.  Not walk slow but to stop at all the important sites along the way.  I am also considering  adding in the Jesus trail.  

To each his own.  Hike your own hike.     

ashen yashen wrote    In general, without a map, you will probably loose the trail inside the city, since the blazes are few, far between, and not instructive the way most Israeli hiking trail blazes are.  As for outside the city, I haven't had a chance to check personally, but my gut feeling says that it will be better marked. As for who is responsible for this trail, I haven't been able to figure out.  The JNF, at least their northern branch, has no knowledge of it.  They suggested it might be an initiative of the Jerusalem branch.  I feel like you probably can't put signs up throughout the city without the city hall's permission, and there are the obvious tourist draws, which would seem to indicate the involvement of the Jerusalem city hall, but that is unconfirmed.  Does anyone know for sure?

It is typical of trails in the US to be poorly blazed or not blazed at all when going thru cities or towns, requiring either a map or a guidebook to follow.  I would assume this might be the case for many trails world wide.  It actually makes quite a bit of sense.  1.  It is unnecessary to have blazes in the city.  Following instructions like "go down main street until you get to the 2nd traffic light and take a right onto 5th ave"  is pretty easy and doesn't require blazes that are needed when your landmarks would be a bunch of trees or rocks that all look alike.  2. Many urbanites find blazes ugly.  In the USA (and I assume Israel as well) you need permission of the building owner to put a blaze on a the side of a building or other private property and the hoops to jump thru for permission to put them on public property is nuts.  IIRC in Hanover, NH the AT is not marked with the standard white blaze but more expensives sign indentifing as the AT, because too many people felt the whiteblaze just looked like graffiti.   

If you are hiking the INT you can see all the sites of the JT without the need to go off the INT. Hike from Dan to Kinneret (Sea of Galilee) and you can visit in 1 day all the holy sites: Mt. of Beatitudes, Capernaum and Tabgha. Continue south and arrive at Yardenit baptismal site, Mt. Tabor, Nazareth, Cana  (2 km off trail) and then Zippori (1 km off trail).  You can add the Jerusaelm trail and spend in the city 2-7 days or more...