if you're an end-user, cacko is pretty good, pretty stable, either in lite or full form - gives you access to all the Sharp applications, as well as many 3rd party ones. I'm on cacko full, I did have a brief foray into cacko-lite, came back to full, been with it since I first owned a Z three months ago.
best wlan card is the socket/symbol (usually quite affordable on ebay)
if you're a hard-core developer, OZ seems to be best. I've not tried it out.