1. Yes - that is, there have been updates, but as of now there is no newer MicroB version than that in the OS2008 release.

2. Not quite like in Firefox - MicroB must do without XUL for memory consumption and performance reasons, so that extensions ported to MicroB need a different, hand-coded GUI. But there already are Greasemonkey, Adblock Plus and Dictionary addons.

3. Sure, but nobody has done that so far - and as existing extensions tend to rely on large screens, mouse and keyboard handling, they are no better than the existing panel. Anything better would have to be done from scratch.

4. That is up to the sites - the IT brower does it as good as any desktop browser, that is, it can remember the values of two-piece text field/password forms. As password entry is more clumsy with the pen, dealing with non-standard login schemes would be desirable. But short of individual per-site solutions or complete form savers there is nothing to be done about them - and neither will be particularily practicable.

5. Something like that should already exist as greasemonkey script. Of course, it has a security tradeoff.

6. Can't be eliminated entirely, thanks to the majority of resolution-dependent sites
which won't scale gently.

7. Adblock Plus has already been ported.