On the PlayStation Blog, we're told about some new content for Sound Shapes that you're going to want to take a look at. Namely, the game has gotten vehicles (!!!) with a $1.99 Car Mini-Album & Creator Pack that is a bit crazy -- but in a good way. If the game's slower pace bothered you, this add-on might be more your speed.
Additionally, there's a free update that introduces six hand-picked albums created by the Sound Shapes community. Can't argue with that price. The game has also been given an Offline Play option, which is always nice to see.
I was able to snag a copy of Sound Shapes during a sale, and although the purchase was easily worth it for the Beck album alone, it was difficult not to be left wanting more content, even with the community-made levels. So, yes, this new stuff is relevant to my interests.