Trying to figure out the balance between categories and tags. If you get too many categories then they themselves become sparse. Any specific example? I agree with you as a whole, we do need to add some more categories. WE might change the submit from a dropdown to a just plain text field. We can categorize there after.

I added my startup Guestlist (http://www.guestlistapp.com) which is event registration. I added it to meeting, but that is really not what it is at all.

I guess my point is that categories are a bad idea. You put MailChimp in sales, but it should be in marketing. Then again, what is the difference between marketing and sales? Productivity is really a subcategory of all the others. You could have a productivity app that focuses entirely on client management, but then that would be called a CRM.

Don't really have a solution, just found it confusing as it currently is.