You could just type in the name of the street, you don't have to know the number of the stop.
However, small signs are going to be affixed to all bus stop with the stop number as well as the number written in braille. This will come in handy when real time information of the bus comes into play as well as being useful for the route planner. Some have already been put up.
KC got in there before me.
I guess my big issue lies in the fact that I don't know the name of the street I want to go to.
For example, if I want to go down Pearse Street, I need to know the exact crossing street of the stop that i want to get off which I don't know. The previous site enables one to identify all streets that went down Pearse Street. This one however, is way too specific for general, casual bus users.
Also, in terms of getting familiar with the bus stop numbers, this does not facilitate any tour planning for trips to places in Dublin that I have never been. Since I live in Dublin and find it confusing, one can only imagine the impact this could have on tourist.
I'm sure the issue could be relieved somewhat should DB integrate some sort of a mapping tool online that will help one identify the numbers of each bus stop by searching for specific locations (as per google maps, etc).