How can I tell if I have a broadcom wireless card?

I just read that Broadcom has open-sourced their wireless adapter drivers and was curious if this would have any affect on my Dell XPS M1330 which sometimes has flaky wifi.

You can use lshw to show information on all devices in you system, forinstance what driver the device uses, this information will look something like this:

*-network
            description: Wireless interface
            product: PRO/Wireless 2200BG [Calexico2] Network Connection
            vendor: Intel Corporation
            physical id: 2
            bus info: pci@0000:0b:02.0
            logical name: eth1
            version: 05
            serial: 01:22:ff:00:11:99
            width: 32 bits
            clock: 33MHz
            capabilities: pm bus_master cap_list ethernet physical wireless
            configuration: broadcast=yes driver=ipw2200 driverversion=1.2.2kmprq firmware=ABG:9.0.5.27 (Dec 12 2007) ip=192.168.2.100 latency=64 link=yes maxlatency=24 mingnt=3 multicast=yes wireless=IEEE 802.11g
            resources: irq:21 memory:b4001000-b4001fff

In the line starting with configuration: it says driver=ipw2200 which mens my wireless uses the ipw2200 kernel driver this can in turn point you to weather you will (in time) benefit from this release. As far as i know all the broardcom network drivers have been released, this means that if you use any broardcom driver now it will in time (properly) get better supported.

lspci should have an entry for your wireless adapter, including the manufacturer.