I browse MN on my tablet more than on laptop and get the mobile version when I do. In any of the topics in Talk, the thread titles are too small and too close together in the the list so it's hard to click on a title and half the time end up clicking the wrong one and having to go back. Granted I can zoom but it goes back to normal size when I hit back so I have to constantly zoom in again when returning to the thread list.
Best practice says that a touch target on a device needs to be a minimum of 7mm, ideally at least 9mm for accuracy and with a decent gap between items.
Could you increase the text size and margin between links?
This article on touch sizes may be of use to you: www.lukew.com/ff/entry.asp?1085