OK gang - this is my first post, so go easy on me!
I don't have a clue why this is the first topic I chose to reply to... I don't even have cable so I don't know who half of these people are! But I do watch fashion a bit, so here are my impressions as I'm looking at the pics:
best:
Mary Lynn Rajskub - no clue who she is, but this is my fave of the lot... maybe copying Kirsten Dunst a bit too much and the shoes are not quite my taste, but overall, really wow
Sandra Oh - apart from looking a tad skinny, original and stunning
Mischa Barton - works, works, works
Allyson Hannigan - AMAZING dress, not 100% on the hairdo, but overall thumbs way up
Glenn Close - appropriate, elegant, understated, sophisticated, perfection
Geena Davis - where's she been hiding? love it!
worst:
Tess Smith - I've no clue who she is, and honestly, I don't want to know

Star Jones - call the Renaissance Faire, we've found their missing queen
also-rans:
Debra Messing - I've even stood on my head, but I can't make this work
Halle Berry - how is it possible to make this woman look bad?
JLH needs to quit channeling Audrey Hepburn and find a new gig
Kyra Sedgwick - blah hair, and I just don't like dresses that blend with the skin
Patricia Arquette - I'm getting sick of her retro hair all the time
Teri Hatcher - looks very polished and elegant, I'm just not feelin' it
Jennifer Garner - looks gorgeous except for the frizzed out hair pile
Heidi Klum - a stunning woman, but what the flippin hey-ho is she wearing?
Marcia Cross - love the colors, but the fabric reminds me of a bad prom dress
Charlize Theron - something just looks odd, totally wrong shoes
Marg Helgenberger - beautiful woman, consistently... adequate
Mariska Hargitay - OK dress, hair don't
Blythe Danner - B+ on the dress, A overall for just being so lovely
Overall, kind of a mediocre assortment.
