I got Hana to Yume Issue 19 today.
The freebie is a pair of Monochrome Kids paper clips:
Here's the latest on Hana to Akuma:
Here are a few of the key pages that summarize the events in "Hana to Akuma" Chp 54 (Sorry for the ever changing summary that I wrote earlier).
Links to the Hana to Akuma Chp 54 Highlights: (Zip)(PDF)
There's nothing about how many chapters are left in the series.
Other news: there's a new volume of "Hana Kimi" coming out. It's called "Hana-Kimi: Afterschool." It appears to be a compilation of the extra stories that came out after the official end of the series.
I wonder if this means there will be a Viz version for the US? That would be wonderful :)!