For those who miss the lj-cut functionality provided by LiveJournal - here's how you can do it in Vox (only for those using Firefox or any other browser that is able to execute GreaseMonkey scripts):
1. Install GreaseMonkey, if you haven't done it already.
2. Install this script
3. When composing a post, that will contain a hidden part, use the following:
<vox-cut text="text to appear above the cut">text to be hidden</vox-cut>
Comments
Text
<hr>
Cut text
<hr>
And then have the script turn everything between the horizontal rules into a cut. That way, if someone has GM and the script installed, they see it as a cut. If they don't, they just see the separators, which isn't quite as ungainly as raw tags in a post.
It's all a temp hack anyway, designed with the (relatively) tightly knit ex-ljers bunch in mind, so I don't see that much of a problem here :)
So if the script was doing a regular expression to place the text between two <hr> tags in a cut, it would show it as the cut. For anyone without the script installed, it would show the text between two horizontal rules.
For example, here's a sample page source from the div class="asset-body preview-links" in a test post I just made:
<p>This is text before the cut</p><hr /><p></p><p>Stuff here</p><p>Stuff</p><p>More Stuff</p><hr /><p><br /> </p>
You could then do a regular expression and take everything between the two <hr /> tags to put in the cut, much like you do with the vox-cut tag.
Probably not worth changing now - if I thought there was a bigger GM presence out there, I would put together something like this and urge readers to install it so I could enhance some of my blog posts. But you're right - this is probably meant more for those folks that know what they're doing and want to get back some functionality that's not available over here.