While these apps aren't all explicitly designed for Honeycomb tablets, they take good advantage of the larger screen real estate and deliver an excellent touch-control experience. I'll be watching with interest as new apps continue to embrace the bigger screen.
DataViz Documents To Go
Unlike most office apps for Android, Documents To Go offers excellent formatting fidelity with Microsoft Office documents. The free version on Android can only read these documents, not create them, but it reads them beautifully. For this feature alone, it's well worth having Docs To Go installed on your Honeycomb tablet.
The premium version of Documents To Go, which lets you create and edit Office documents and syncs with Google Docs, will set you back $15. (That's a couple bucks less than the iPad version.) If you're a heavy Microsoft Office user who wants the ability to work with Word, Excel, or PowerPoint files on the tablet, this upgrade is well worth the price.
Google Docs