miccocan: I had the same problem you did with not being able to load Opera even though I was connected to my router (by checking the Wifi Status menu). I eventually did the reset option found by SamY (http://forum.archosfans.com/viewtopic.php?t=1527
), and I am now able to load Opera.
What's strange, is that I was always able to open Opera, but could never load any webpages despite being connected to my router (I was assigned an IP address by router, etc). Then, out of nowhere, Opera wouldn't open. I am pretty sure I have the same Linksys router model that others who were having wifi issues had (something like BFW.... ). I have been able to successfully use the wifi to browse the web using Opera on other networks (friend's houses, etc), but never checked what routers they were using.
Not sure if the two issues are related (Opera not loading/Not being able to load webpages despite being connected), though...