Tags, consistency and the use of autocomplete
Any knowledge system that use tags to structure information, like TA, provide to us a wonderful flexibility to design our own workflow, and I see a system like this as a life companion, that preferably will be used for many and many years to come.
The problem though is that the tags used to "stamp" a given zettel will change over time, this can happen because one day we can tag something as "mobile" for example, and on the next month you can tag as "cell phone". This will create a confusion overtime, and that's why, I would like to suggest autocomplete for tags, something like 2Do does.
This wouldn't prevent the misuse of tags, but would narrow the margin for error.
Btw, I wish you both and for everybody, and excellent New Year's Eve!!!