Unfortunately I think I-do has become a victim of a couple of things...
Spammers, when they infest, are a PITA. Don't know the answer to this one, as they all seem to be real people, however poor their english skills are!
There was that blowup of nastiness about, oh 18 months or so ago now? I think a lot of people disappeared then, particularly with the emergence of the VPL forum

I've tried to get involved there, but I tend to go a few weeks at a time without posting anything (here too

) and getting locked out continually is a bit off-putting.
I-Do's relevance as a wedding forum seems to have lessened pretty dramatically - there have been very few new members signing up for weddings specifically in the last couple of years, which means the place is less busy, therefore less googleable - vicious circle. I so miss looking at all the beautiful weddings that would happen every weekend!
FB has certainly had a big impact, my 2009 wedding group has gone over, and although we have tried to keep it here, my mums-to-be group is reasonably active there as well.
I am so grateful for the massive archive of collective knowledge here, especially regarding all things baby! I've learnt SO MUCH from this place over the years!
I wonder if the site owners care about the dwindling activity? Surely it can't be very good for their advertising revenue