TheSixthAxis:
We saw it back at 2007's E3; the ability to take a photo within PlayStation Home, automatically saved to the HDD, and placed in a picture frame for your apartment. Then again, Phil Harrison showed us a lot of exciting options within Home, which only some have been developed and released over the course of two years.
Locust_Star, Home Manager in America recently replied to a request about screen capturing within Home: "[It's] a simple feature that I know the devs are working on. My magic 8-ball says [it's] coming sooner rather than later."
So could we expect this as early as this coming Thursday? Visible Home updates seem to occur fortnightly now, so the chances of this becoming a reality are increased somewhat as last week was just another maintenance update.