This post is a bit late out of the gate in the Wd 2 thread. I came across it in
a 2004 APOD post about the HI region surrounding Wd 2. The image clearly shows the line of about 5 stars that Simmo and Paddy reported. The RCW 49 nebulosity isn't nearly as visible at the eyepiece, but does reveal as a large extended patch when using a UHC filter. I checked it out last night under good skies and it shows as a miniature, faded version of the APOD image from Spitzer.
A bit of research has revealed Westerlund 2 to be one of the hottest and most interesting clusters in our skies. I'm about to post a new thread in three sections about it in the Astronomy & Science list.