I’ve been installing the WordPress plugin WPTouch on all my blogs and many client blogs lately. It “deliver a fast, user-friendly and stylish version of your site to your iPhone, iPod touch, Android, Opera Mini mobile, Palm Pre and BlackBerry Storm visitors without modifying a single bit of code (or affecting) your regular desktop theme.”
Comments are visible after clicking on any post. You can add a comment as well. The best way to keep track of comments, however, is to use an RSS reader app on your mobile device and subscribe to the blog’s comments RSS feed. Then if you see a comment that you’d like to comment on, click the link to the comment. It will activate the mobile-optimized view of the web page and position you for typing in your comment.