Mapping Center Answer:

There's a simple trick to doing this--though it is predicated on having your streets feature class stored in a geodatabase.

1.  Create a geometric network using your streets feature class as the only feature class.  A by-product of a geometric network is a junctions feature class.  Copy this feature class to a new name, and delete the geometric network.

2.  You can symbolize the junctions using marker symbols of varying sizes that have their color assigned to 'No Color'.  Then set the feature weights to 1000 (using Maplex) or high (using Standard Label Engine).

Optionally, you can select subsets of the junctions by street class, e.g., select only those junctions that are intersected by major streets.