Source:
http://sketchupdate.blogspot.com/2010/08/street-view-in-building-maker.html

[title fixed]

Auts, it's imagery...

Simply:

<< now you can also use imagery directly from Street View on Google Maps!

Start modeling your building using the aerial imagery. After you have constrained a block in at least two aerial images, you will be able to “Add Street View Images” from a drop down menu on the left-hand side. >>

Thanks for fixing the title field.