You're amazing, Brett, but sometimes you work way too hard!
I too desired a Spillo bookmarklet, and I just emailed the developer to ask if they had a URL-handler scheme for it. Within a few hours, he replied to me with the complete definition of the URL-scheme:
Scheme: spillo
Method: bookmark
Query parameters:
url – The post URL, a string
title – The post title, a string
desc – The post description, a string
tags – The post tags, a list of tags, as a string separated by whitespace
unread – The post unread status, 1 or 0
private – The post private status, 1 or 0
So, if you only want to show the bookmark window without populating it, you would use the following URL:
spillo:///bookmark
To show the bookmark window with a given URL you’d do:
spillo:///bookmark?url=google.com
And finally a more complex example:
spillo:///bookmark?url=google.com&title=Google&desc=Google%20homepage&tags=google%20search&unread=1&private=1