I don't really rate Halliday either to be honest, although I'd certainly take his reviews over Advocate, Spectator et al (Harvey Steinman and Jay Miller are both considered a bit of a laughing stock among wine nerds here). A friend of mine who is a boutique winemaker and in training to be a Master of Wine recently opined that Halliday is losing his palate, he is after all over 70 now. What is definitely true is that he tastes far too many wines. In an effort to be comprehensive for his annual wine book, he tastes anything up to 150 wines a day for days on end. imo you simply can't do justice to wines doing that.
As far as I know there's nowhere reviews are offered for free, but I have a subscription to
The Wine Front, run by a couple of guys called Gary Walsh and Campbell Mattinson. Subscription is only ~$US 35 a year. They make no effort to be comprehensive, but probably average 3-4 reviews a day. They taste all the wines over a period of a few days and usually only post reviews of wines they thought were decent buys. Generally they cover wines just released or about to be released, but sometimes they'll report on vertical tastings they've attended, etc. Walsh in particular I like, he has a great writing style, an excellent palate, and an interest in the cooler climate areas of Australia - in particular a fetish for the Hunter Valley. The pair of them also release an annual called the Big Red Wine Book, which has wines not covered on The Wine Front and as the name suggests covers only red wine.
The only problem for you would be getting hold of some of the wines they mention - even I can find it tricky to track down some of the more obscure stuff. Unless you have the capacity to ship wine to the US yourself, I would guess that the majority of the wines they mention will be unavailable.