[kh99]

There are two ways of doing that that I can see (I don't know if either would qualify as "elegant"): One would be to edit the file includes/functions_newpost.php and change the query that finds the users (around line 1186). You could add a JOIN of the userfield table, and add the fields you want to the fields being selected, then they should be available in $touser.

The other way would be to write a plugin using hook newpost_notification_message and write your own query to get the field. This way you're not modifying any files, but it would add 1 query per subscribed user every time someone posts.