Yes... I have seen those. I imagine that type of ladder could be pretty practical.
I think part of my conundrum is that I may be asking the Zip to be something it's not. As much as I love those 22-foot inboards with the graceful transoms and the beautiful swim decks.... the little Zip is not, and cannot be, one of those. But, I'm trying to find some type of arrangement that would provide some means of re-boarding the boat from the water AND:
1. Be able to be deployed from the water (in case of an "overboard" situation)
2. Add to, or at least not detract from, the original aesthetics of the design
3. Be minimalist, but usable. (It is not likely that it will see much repeated use.)
I keep contemplating different possibilities to incorporate a simple and attractive boarding step onto the transom that might perhaps mimic the look of a swim platform but much smaller. I could use the foldable step I bought at G11, and the folded part could fit against the transom somehow.
Another possibility I've begun to consider is the compact Garelick folding ladder. The mounting bolt pattern is very compact, which would be great for a small transom like the Zip. Aesthetically, it's not my favorite... But, I thought a similar ladder on Bob Brandenstein's Malahini looked very attractive.
I guess I'm still looking for that "Ah-Ha" moment. In this case, there may not be one... I don't know.