This is pretty fantastic.

Some feedback:

* I'd really love to see a blog for the subtask site, with some information about what the roadmap looks like, what type of stack your built on, etc.

* SSL for the low end paid tier

* Conversion to other currencies

* Some indication on the plans page as to what payment methods are accepted

* The keyboard shortcuts are working extremely well, and the site is very responsive, love it!

* I really like that there is no per-user restriction on projects

* It would be really awesome to see integration with something like Trello, Github issues, etc.

* Definitely needs stronger password support

Keep up the great work! Gems like this are the only reason I keep coming back to HN.