I need to know how many objects i got selected for a particular issue and ussualy are too many to count one by one. I know that this information is provided in other software like Corel or Freehand, but I didn't find out how to get this info in Illustrator.
Open the Document Info palette.
From its flyout menu, turn on Selection Only and Objects.
The palette will not remember those settings. You have to re-select them every time you relaunch Illustrator.
The Document Info palette is a half-baked hack, tagged-on to display a subset of the information in the normally-hidden programmer's window, instead of incorporating the data properly into the program's interface. So it's another completely unintuitive grab-bag of important information that everyone needs, but no one would expect to look for there.