My Miro feature suggestions:
1) Add a setting to suppress "miroguide.com could not be found" alert (maybe an "offline" mode?)
2) Add a setting to set default action to delete functionality ("delete file" or "remove entry from list")
3) Add "send a file to the recycle bin" as a deletion option
4) Add a new file view that displays thumbnails scaling horizontally and vertically
5) A 64-bit build would be great
Although I suspect that these features would have been discussed by your team already I really think that adding these features will push Miro far forward into being even more awesome than it already is.