Currently service links are marked with the same icon that the #info parser function uses, a white question mark on blue background. I do not think that this is a good idea since a question mark suggests information to help related topics.
In the case of service links the user gets directed to pages containing further information (data) in contrast to information (help). To cut a long story short, I suggest replacing the currrent icon with:
http://commons.wikimedia.org/wiki/File:Arrow_icon.png
The arrow suggests "follow me to more information (data)" and is thus better suited for this case and avoids ambiguity and confusion
Version: unspecified
Severity: enhancement