Ok, this code is supposed to solve your problem
<div>{. if | {. ?some-urlvar .} |
<a href="somewhere">Link</a>.}
</div>
And I have one more little question/advice. The ability to create new folders inside shared real ones will be very comfortable, but I haven't seen this in the to-do-list.
if you mean remotely, this is the line in the to-do-list:
[NEW] folder creation (with upload rights)
if you mean in the HFS window, you can, just try.