I live very near the missing lady's house too, so would just like to point out that living in the area doesn't make me an expert, and local gossip in Brisbane's 'leafy western suburbs' is one of its biggest problems. People take an inch and create a mile. I can guarantee the husband would not be the only local to be carrying on a 'common knowledge' affair ... and this couple would not be the only ones who argue regularly - the place is a pit of fakery and snootiness, and everyone is so nosey he'd have to have a network of tunnels to escape the Flying Monkeys of Brookfield. The disadvantage Gerard Baden-Clay has is his high(ish) profile, being an aspiring business person and social climber in the local community - he's never been under the radar of the locals.
Anyone quoting the 'story changing' through this last 8 days needs to remember most people are basing their knowledge on reporting from news.com.au and The Courier Mail, widely known to be sources of some of the most inaccurate and shoddy reporting on the planet. If you read any of the news.com.au articles almost every one contains an inaccuracy, from "Allison Baden Clay's sister-in-law talks about her sister" to the recent "Gerard Baden-Clay collects clothes at 4 pm and arrives at his parents and 4.55 am." They are just poor quality on detail and editing, and you can be sure their ability to transcribe facts given by the police is equally poor.
And, before people jump on a barking dog and an affair as proof / motive, bear in mind their house has no immediate neighbours - it adjoins a church and a childcare centre, both of which were empty on the night she disappeared. The area is full of wildlife and a distant neighbour's dog barking is a ridiculous thing to be so widely reported - there's even a picture of the dog in the paper, which shows how short of anything useful the newspaper is. As mentioned, the husband would be one of a number of locals engaged in affairs, if this is proven, and none of them have previously done anything to their wives (except give them money and sports cars to keep them quiet).
Some of the posts here suggest he was since driving an impounded car and destroying possible evidence - really people should check their facts before posting on here as a witchhunt, the couple's kids might get to read this one day and you would hope people would stick to facts, show some sensitivity and keep gossip and personal dislike for the guy's mannerisms out of it.
Obviously the police have chosen the prime suspect in the case. The circumstantial evidence, unusual covering story and following events, scratches on the husband, and some of the investigations of the couple's relationship all look bad for him. Judging by questions asked by the police, both locally and in the media, I don't think anyone honestly believes the lady left on a voluntary night walk at 10pm. Given how poorly things have played out for the husband, if he's been involved in her going missing, it was clearly not premeditated; he's probably made some ill-informed and totally stupid decision under pressure, presumably after an argument has escalated, and now has to live with the consequences. If she was being adequately treated for depression, it's extremely unlikely she would voluntarily leave the 3 children she loved.
Out of the entire sad case all I hope is that poor lady's 3 little girls get to see her again, and that justice is served. I agree this is likely to be solved soon - it doesn't matter that this area is bushy and rugged in a lot of areas - there is only so many places she can be, before she's discovered, particularly if she was moved in late night/early morning in what must have been a relatively tight timeframe.
I'd encourage everyone to look for the facts underlying the poorly-researched drivel online, and spare a thought for the kids. In an ideal world this is all a big media beat up and terrible mistake and she'll be found alive. Sadly for the rest of her family, that's probably not going to be the case.