Thanks for encouragement. :-)

A few quick reactions:

• Ad 1: In my opinion, page is barely readable when labels are not bolded - they mix with the data. The idea is to clearly distinguish labels from data. Making data bold doesn't make sense, since the page becomes really heavy. What if we changed the colour of labels to dark grey, e.g. #555? If you have Firebug installed, it's easy to quickly add a property to CSS class and see how would it look like.
• Ad 2: Bolding the Skype id is a consistency issue - each "primary" object in the group is bolded. Maybe an idea here is not to distinguish primary object if there is only one in the group?
• Ad 3: Shading of cells has been used to "drive the eye" when looking at the data - the page looks much more cluttered without it.
• Ad 4 & 5: Maybe I'm missing something, but the font size for existing screen (2.2) is slightly larger than for the mockup (upcoming 2.3). Or did I misunderstood?

Thanks for remark on collapsible sections - it's a good use case for keeping them.