The modules page is already quite long with only the core modules but when you add views, cck and other modules you're going to use on your project it becomes unwieldy. I've created a little proof-of-concept module that turns the fieldsets on this page into tabs.
Dependency: http://drupal.org/project/jquery_ui and you need to download http://code.google.com/p/jquery-ui/downloads/list?can=3&q=1.6 unpack it in the jquery_ui directory and rename it to jquery.ui.
Entering passwords on a mobile phone is a pain since I'm never sure if I entered the correct letter. Now it seems that the standard password field is more of a pain than I thought. Jakob Nielsen tells everything in his alertbox: http://www.useit.com/alertbox/passwords.html
Usability suffers when users type in passwords and the only feedback they get is a row of bullets. Typically, masking passwords doesn't even increase security, but it does cost you business due to login failures.
When building a website you often need to know where the user is on the website to offer them context specific content and help them on their way. The problem here is that still a lot of builders do this by keeping explicit information about the user's location in a cookie or in the session. This is problematic since it limits the possibilities for the user when he visits your website. Also, since tabs are common in the browser it is not unusual for a user to open several tabs from one website that look interesting and that will be read after the current page is done.