Request:
url based choice for how items are fetched. That way we can share/use per forum as needed.
mysite.com/forums/forum1.19/index.rss?&sort=threadcreatedate&link=firstpost
mysite.com/forums/forum1.19/index.rss?&sort=lastpostdate&link=lastpost
plus, any other variables you offer, though I personally don't need/want.
Would also be nice if you could add an extra non-standard url field for both first post/last post, so that both are available, and both can be parsed out of the feed into content.
That way we can display the first post link, with a small icon next to it going to the last post for regular visitors who've already read the thread, and just want to pick back up on the newest stuff. Maybe a third "unread" for logged in users to use.