I had the old bookmarklet working on my desktop, but it didn't work on the iPad.

I suspect this is because it has popup blocking, or doesn't run a script in the body of a web page, or some other iPad-ism thing.

So I sniff for Safari on iPad in the user-agent header, and if it smells like an iPad, instead of popping up a window, I just redirect to the popup. It replaces whatever was in that tab, big deal. When you click Submit the thing still posts to your feed, that's what counts.

So I can post from my iPad again. Happy. :-)