I suggest using simplyMepis linux myself.
I recently installed the beta for 7.0 and am thrilled with how well my wireless works:
I no longer need to dual boot windows for wireless on the road. (It worked in previous versions but connecting to random open access points when mobile was next to impossible.)
Note that I have HAD wireless working for some time- but never as easily and thoroughly as it is with Mepis 7 beta. (No other beta-related issues noted yet either.)
One thing some folks might not like is the fact that Mepis uses Kde- some prefer gnome. I suspect the newest version of Ubuntu would take care of the issue for most if you prefer gnome to Kde.
I now have just one application keeping windows on my laptop, and I am furiously searching for solutions.