New homebrew and plugins are still being pushed for the PSP. Just the other day, we've seen an entirely new UMD Dumper hit the scene. To join it, is an update to Quickboot.
Quickboot is a plugin that allows you to quickly switch between games and applications without having to return to the XMB. It doesn't matter whether the next thing you're launching is a homebrew, an ISO or a PSX game, Quickboot does it all. To make the transistion seamless and to ensure that you don't have to return to the XMB, Quickboot can also change the ISO driver in use.
You'll need to free up anything that uses the NOTE key such as screenshot plugins as that is the one you'll be using to bring up the Quickboot menu. You can grab Quickboot below.