Rings are actually the only thing I have that I can do dips on, except for chairs, and I've never been comfortable with those. I've been working on my support, and doing my Day 2 pushups on the rings, and I've got to where I can do two dips pretty reliably, and three if the weather is really nice.
I know that, by raising your feet, you can make pushups harder, and you'll eventually wind up doing them from a handstand. Do dips contribute to this continuum at all, or are they just different? Dips and HSPUs are both used in the advanced workouts, if I remember right.
I want the dip because in the sunny daydream future I'll be practicing muscle-ups, and I hear I need equal parts pullup and dip to do it (and in the fifteen or so range for each, too). So I was thinking, if it ever becomes possible, of plugging dips into the "push" part of the Simplefit formula.
But I also want a real handstand in the sunny daydream future. Sigh. What's an ignorant person to do?