Thanks for the positive feedback, it's always welcome and is part of what makes this application worth working on :)
To answer your points:
- confirmation dialog: this is something that's in the todo, and we already laid the groundwork for it. However, we're concentrating on finishing v0.8 for the moment - mostly fixing the bugs that are reported here and creating UIs for all the configuration options we've added. It'll definitely come, just not in the next few weeks :)
- I'm not sure what you mean by keyboard access to the bookmarks menu. Can you explain a bit better? It's either something that we already have but maybe a bit hidden, or something that should be relatively quick to add.
- you can find a rather long winded explanation of the commands.xml file here: http://www.mucommander.com/forums/viewtopic.php?t=420
. That should tell you everything you need to know to create your custom open with menu. I'll eventually have to add something like that for the associations.xml file (create custom file associations that override the ones defined by the OS), but I frankly haven't had time yet.
Hope that helped!