I wasn't confident in my ability to scope and budget things so I didn't submit any fully-formed proposals, but I did submit a few ideas as community proposals, eg here and here. The way I thought things were going to work was that the @dip.team was going to review community proposals and do the scoping aspect and then invite developers to pitch to work on them. I thought I might put myself forward at that stage, but the part where community proposals got reviewed hasn't happened (yet?).