Another one here seeking a 2-person tent closer to 1.5 lbs. than 2. For slightly over 2 lbs., there's Henry Shire's Tarptent Squall 2, which I have and highly recommend, but I want/need to shave more weight. The field consists of the AGG O2, the SMD Refuge and the Gossamer Gear Squall Classic. My need is for a bug-free shelter that will stand up to alpine weather and hold my 80-lb. dog and me, plus a very occasional grandchild. I'm still waiting for the GG Squall Classic to be back in stock, and that's probably what I'll end up getting.
Of course, if in the meantime Henry comes out with a 2-person Sublite Sil, I'd get that in a heartbeat. EDIT: However, he tells me there are considerable engineering problems involved with widening the Sublite Sil–it's not as simple as it appears to us non-engineering folk.
If you're a BPL subscriber, here are some sources that will help:
http://www.backpackinglight.com/cgi-bin/backpackinglight/agg_o2_tent_review.html
http://www.backpackinglight.com/cgi-bin/backpackinglight/sixmoon_refuge_refugex.html
http://www.backpackinglight.com/cgi-bin/backpackinglight/sotmr_single_wall_tents_2008.html
There's also a review of the Squall Classic, but it's several years old. There's a more recent review on backpackgeartest.org, which is not altogether significant since the tester had benign weather conditions.
That's a weakness of many gear reviews. Too many user reviews are of the genre: "I spent a weekend with [name your tent] in the forests of [name your place]. The weather was clear, sunny and windless. This is an awesome tent!" Under those conditions, you don't even need a tent, except perhaps to keep the bugs off!