unable to connect to wi-fi with a new 10.04 Ubuntu install

Greetings to all. I love Linux, no more Redmond on my Acer extenda 5420 laptop. All is great except my inability to connect via wi-fi. The internal "card" is a Broadcom b43 series. I am willing to do an end run by using a PCMCIA card if anyone can suggest one that would work "out of the box." Any help is appreciated. Thanks everyone. Hank