SCEA’s launched a new media manager for PSP, as you can see in this post on the US PS Blog.
You can download the software for your PC now.
From the post:
Today we are launching a new version of Media Manager for the PSP that allows you to organize and sync your music, photos and other digital content. The new media manager also grants access to the PlayStation Store through the PC and is designed to accommodate the expanding functionality of PSP. With the recent PSP firmware (v 5.01) update which gives you direct access to the PlayStation Store and the new media manager you have multiple ways to get content and manage it.
There’s an explanatory video after the link.