I am using wireless on my Open Solaris laptop. I have an Intel 4965 (iwk driver).
The interesting thing is it usually times out whenever I upload anything. For instance, I have a local hudson server and it periodically fails because it cannot upload artifacts. It rarely fails because it cannot download or fetch updates. Also, I use web services which I upload some information to and those usually timeout as well.
All of these things work fine on my Linux laptop, so it is definitely not the network.
Walter