For those of you that were frustrated with the earlier vector packs because of the conversion required, you are going to love this site. Uberpiglet.com has an outstanding collection of silhouettes that are already in SVG format. All you need to do is open them up in Inkscape and save the image you want into a new document for import into SCAL.
Some examples include the Safari and Farm Animals set from Spoon Graphics:
and the Transportation Pack from D.A.T.:
There are 15 sets in all covering business people, dancing people, sports, florals and more. SCAL users are going to want all of them!