Feature-creep version! I have added an additional list configuration/lookup column called Color.
This allows you to specify an alternate icon/color for your push-pins by item.
The format of the Color column in your list should be Single Line of Text and in the form of a URL. In the example below, I used:
Here’s the Source; .WSP is in the /Bin/Release Directory.
I don’t know C-Sharp from Sh!T; so your mileage may vary. May break if you specify your Color column and have a NULL in there.