This may or may not have been mentioned by others, but I have noted the following:
If you set Tiles to load automatically at startup and also use Tiles to suppress the Win7 taskbar, the taskbar is not completely suppressed. Rather it goes into Autohide mode, causing it to reappear whenever I cursor over the icons in my ObjectDock dock (docked to the bottom of the screen).
I have resolved this by using ObjectDock to suppress the taskbar.
Also, I have noticed that unless you select the option to have Tiles launch automatically at startup, Tiles does not include any power options (Shutdown, etc.) and it is necessary either to access the Shutdown button directly through Win7, or put a docklet into ObjectDock.
I assume that the conflict with the taskbar will be resolved eventually, but I would like to see power options available in Tiles whether the program is loaded automatically or manually.
All in all, though, I am really enjoying the program. I can place it to the side of my second screen, get rid of the taskbar, and free up real estate on my first screen. I still haven't figured out what the filter function really does, but as I am not a power user, it may not be all that relevant.