The launcher is just the series of home pages with the app shortcuts on. By "stock" I mean the one that came with the phone (there are many replacement launchers in the Android Market, such as WidgetLocker, that give added functionality and customisability).
To post a screenshot (just so it's clear what you mean) you'd need to have the home page showing, the press back and OK together. This will put a screenshot in your DCIM folder (camera folder). Download this to your PC then upload it to a photo hosting site such as Photobucket, then link to it here

See a screenshot from my own phone (using a launcher relacement which I don't bother with now) in this thread:
viewtopic.php?f=2&t=61618SV