nickreynolds - 10:50 pm on Nov 1, 2010 (gmt 0)
First - it makes the search results look cluttered and confusing.
Second - different but similar searches can bring up a different format of results.
One type has the full organic listing with map flags and picture. Second type has map listings and then organic results, separate.
It seems that the first type means you have to have a website to be listed, the second type seems to mean you can be in the maps list without your own site.
Again Google making a simple job (searching for a local business) more complicated.