Virtually every Blu-Ray player on the market, outside of the PS3, has horrendous reviews for Wireless Internet capabilities. Many models from the biggest names that are on the store shelves, are functionally DOA with manufacturer acknowledgement and uncorrected firmware, with no updates available.
Every model I recently looked up at Best Buy, regardless of the price point, had numerous negative reviews on Amazon for wireless interface. It seems all the manufacturers are having trouble with this, with numerous models being abandoned, even though they're still being sold.
You can try going to some AV forums or check Amazon reviews for your model, there's usually some recommendations to get basic functionality out of them. Good luck.
I ended up picking a decent Sony model and rolling the dice. After quite a bit of frustration, Netflix now works wonders on it... unfortunately I've discovered that not every Blu-Ray movie does
I did my research, and the LG BD670 came highly recommended by CNET - a source that I consider to be fairly reliable. I also read the reviews on CNET and Amazon, which is where I bought the thing. After I started having issues, I dug further and ID'd a potential fix.
In terms of reviews, no matter what you're buying, somebody is disaffected by it in some way. So I look at the dirty laundry and try to figure out trends. If the trends seem to point in a specific area, I can somewhat unscientifically conclude that the issue has substance. If not, it's just a shrug of the shoulders. In the end, it's ultimately a roll of the dice.
Part of my issue with Blu-Ray and All-Things-Video-and-Audio these days, is my own learning curve. I don't do PS3 (I even had to look that up!), Wii, or any of those other game boxes, and the technology moves so fast I couldn't keep up even if I wanted to. So there's a ton for me to learn. This issue could very well be a router configuration issue that simply isn't well known or defined -- dunno really.
When I get some time tomorrow (maybe), I'll dig into a bit more.