Ability to link to the current view would be nice... I wanted to show a friend a neighbourhood I was looking at but couldn't :) Sorry to suggesting such low-priority things, I'm a bit OCD about these things...
A workaround is to save something in the neighborhood to your favorites list, and then save the favorites list. This'll shoot you an email with a link that can restore that list, and you can send/forward that link to your friend. Once the list is loaded up, they can click on the go to marker button/graphic in the saved favorites list.
Depends on use case: the case I was in was just that I wanted to show a friend what was available in a particular neighbourhood, as opposed to a specific set of postings.