Every text rendering program has its own text-selection context menu. Hacking all of them to add "Add CintaNotes note" menu item sounds effective, but way too intrusive :)

(Configurable) Ctrl+F12 global hotkey doesn't look way less convenient than menu item, does it?

The feature looks pointless to me. But if it gets popular, here's a possible implementation.

Check out tagging mechanics in CASEapps Tags application for Mac in it's screencast here:

http://www.caseapps.com/tags/

Probably it could be modified for multi-term tags. For example, user types "three word tag", then hits a special key (like ';'), and the words are grouped into a tag, which is renderred in an intuitive single block.

I hope it's obvious I'm not promoting the product, it's just an example of a good implementation.

In the forum it is suggested to indicate the level of tag "relevance" by it's order in tag field.

Another possible approach is to introduce a "level of relevance" of a tag to a given note. It could be simple 3 or 5 grade level, or in the worst case, any integer number. In case with 3 grade relevancy, it could look like this:

And the fast keyboard input would work as follows:

1. Type some letters to spawn autocomplete window

2. Use Up/Down arrows to select a tag

3. Use Left/Right arrows to select relevancy from 1 to 3 points

4. Press Enter to confirm

5. Relevancy points are indicated next to the tag

In case with any integer number, tag input could look like this: "dog*9 pet*6 animal*3" (using an example by faus in forum thread).

This is a fancy feature, however, I don't see any point implementing it (at least now), because:

1. It seems to introduce more complexity than benefit. I cannot imagine how this feature enhances user experience.

2. Planned feature "Tag grouping/hierarchy" [1] might be somwhere near this one.

[1] http://roadmap.cintanotes.com/topic/3182-tag-groupinghierarchy/