1) Status updates back to Facebook (from JomSocial) - it's coming.. would give a June timeframe
2) This is planned for a future update, possibly June/July. Basically, our plan is to have a javascript tag that you can add to a submit button, and it will pop-up a Facebook status-update window with a box from the form used to pre-populate the update. The user would simply have to hit 'submit' for it to post. This has advantages in that it's very flexible (can be used for a lot of components) and also doesn't require that the user's logged into your site through Facebook, they just need a FB account. Disadvantage is that it will take a little bit of code to implement throughout your site. We don't know of any good automated way to do this though as there's simply too many places people want JFBConnect to integrate with, and it simply isn't possible to accommodate all of them. Feedback welcome on this idea, or better suggestions!
3) This is harder, and something that we may look into in the future, but don't have a current timeline. Posting pictures to Facebook is a complex process, and also has privacy implications that we need to investigate further. Even if it's a user-choice thing, there's still specific hurdles we'd have to tackle to make it suitable for all sites.
Hope the above helps a little with our roadmap. Basically, until now, we've focused a lot on one-way communication (pulling from Facebook), the last few releases have started some strides toward pushing to Facebook, and you'll see more in that area with future releases.
Regarding Joomla 1.6 vs 1.5, they are, and will remain, in feature parity through at least the rest of 2011. Since Joomla 1.6 does have a few features that 1.5 doesn't, there may be one or 2 specific features to that release, but all Facebook integration aspects we plan to keep adding to both the 1.5 and 1.6 versions for the forseeable future.
Also, 3.2.1 is the currently available release for Joomla 1.5. We'll be updating our version numbers to be in-sync between the 1.5 and 1.6 versions in the future to avoid confusion.
Hope this helps, and thanks for the input!