http://web.archive.org/web/*/http://baby-gaga.com
http://web.archive.org/web/20031107044423/http://www.baby-gaga.com/
There's the first archive, from Nov 7th, 2003. Doesn't seem to have a forum yet.
Then it was under construction for a while.
http://web.archive.org/web/20040518141140/http://baby-gaga.com/
Updated, archived on May 18th 2004, still no forum.
http://web.archive.org/web/20040924235407/http://www.baby-gaga.com/
Updated, archived on Sept 24th, 2004. Website is now about strollers. No forum yet.
http://web.archive.org/web/20050401233819/http://www.baby-gaga.com/
Updated. Archived April 1st, 2005. Tickers added, and a link to the forum now exists (labeled as a stroller forum).
http://web.archive.org/web/20051215225958/http://www.baby-gaga.com/
Updated and archived Dec 15th, 2005 (since there was an archive the same day with the previous layout, it's safe to conclude that the layout changed Dec. 15th). This layout was the layout that most "OGs" will be familiar with.
http://web.archive.org/web/20041224010156/http://forum.baby-gaga.com/
The first archive for the forum is Dec 24th, 2004. At that point, there are only 38 articles and 8 members. Based upon the join date of member1 (baby gaga), it appears the forum went live Dec 14th, 2004.
http://web.archive.org/web/20051228140203/http://forum.baby-gaga.com/
As of Dec 28th, 2005, the forum has expanded some and a forum for the tickers has been added.
http://web.archive.org/web/20060206193856/http://forum.baby-gaga.com/
As of Feb 6th, 2006 a pregnancy section of the forum has been added.
http://web.archive.org/web/20060409210308/http://forum.baby-gaga.com/
As of April 9th, 2006 PWI and PWT have been added, along with due date buddies, TP, and baby names.
http://web.archive.org/web/20061012205332/http://forum.baby-gaga.com/
As of Oct 12th, 2006, The Sex and Relationships sub forum has been added.
http://web.archive.org/web/20061114052111/http://forum.baby-gaga.com/
As of Nov 14th, 2006, the miscarriages forum, and Parents with children, pre-teens and teens added.
http://web.archive.org/web/20070217222043/http://forum.baby-gaga.com/
As of Feb 17th, 2007, the TTC and Adoption forum has been added.
http://web.archive.org/web/20070225235100/http://forum.baby-gaga.com/
As of Feb 25th, 2007 TDC added (and it has, at that time, 5 threads with 107 posts).
http://web.archive.org/web/20070323001033/http://forum.baby-gaga.com/
As of March 23rd, 2007 Birth Announcements, Pregnancy Resources and Links, The Photo Spot, Feedback and Comments and (my baby) D&D have been added.
http://web.archive.org/web/20070428202749/http://forum.baby-gaga.com/
As of April 28th, the original incarnation of the weight loss forum (Losing Your Baby Bumps, Big Butts, & Basic Bulges) and Parents with Preemies added.
http://web.archive.org/web/20070914202733/http://forum.baby-gaga.com/
As of Sept 14th, 2007, Miscarriages forum changed to Suffering and Loss forum.
http://web.archive.org/web/20071027075639/http://forum.baby-gaga.com/
As of Oct 27th, 2007 the current forum layout is live (switched over sometime between the last archive on Oct 21st and this archive on the 27th). Feedback and comments becomes FAQs and Feedback.
http://web.archive.org/web/20071221142757/http://forum.baby-gaga.com/
As of Dec 21st, 2007, Parenting resources and links added.
The most recent archive was Feb 8th, 2008 - a few forums have been added since then.
I'm pretty sure I forgot a few things (like I didn't bother with the various incarnations of the shopping forums, but meh), but I think this is a fairly complete history of baby-gaga and the forums.
Hopefully someone find this interesting, because while I don't need to justify dredging through links like this (frankly, it was fun in a weird, boring way), it'd be nice if someone other than just myself found it interesting, lol.
Let me know if you find any broken links, heh, I had to link everything by hand.
C.