I am looking to create a city directory web app, and the site will need to be able to calculate distances between two geospatial points (like the distance between the user and a restaurant, or the distance between two restaurants).
I am a newbie to geospatial function, and recently started using PostGIS. I have been having a heck of a time installing pgRouting into my PostGIS 1.4/PostgreSQL 8.4 server, so am thinking about giving it up for now until I feel like I need it. I have already spent several hours trying to install pgRouting on my OSX 10.6 Snow Leopard machine with little success.
With that said, what exactly am I giving up? It seems like ST_Distance will satisfy most of my needs in the short term and things like the Travelling Salesman Problem won't really apply to webapp (at least not for a while, if ever). Is there something else that I am giving up? Another reason to use pgRouting?
(As a side note, if you know of a place that makes installing pgRouting easy, please point me in that direction, as I have already tried about 3 pages worth of several google results for tutorials/instructions).