[Lucid:]

Sell back feature is being worked on.

I never read anyone's "About me." =/ profiles are also being worked on and will eventually be totally different, so I wouldn't worry about that at all.

not all the hair or items are uploaded. we will obviously have shop updates. don't worry. there's plenty to play with now.

we already can preview items while shopping, just not on a base. having a base there to see the items on, again, I am pretty sure is being worked on.

if you want to search the shops by color, just type the color you want into the bar as a search term. easy enough. every single item has its color in the name, aside from a few special sets.

we do have a friends list, it's on your profile, and also visible when you click "Open Contacts Popup" on the top of the page.

by fixing the comment box, do you mean the comments that overlap the picture of the avatar? I agree, that should be fixed. however, since profiles will eventually be redone, this shouldn't be too much of a problem. just highlight the text to see it for now.

we also do have thread subscriptions, you can find it under the quick reply box, along with "show printable version" and "email this page". if you mean bookmarking specific pages within a thread, you can just do that on your browser.

That leaves:
Shops organized by category (which also might be being worked on, I'm not certain)
Shopping basket
Facebook link
Wish List