LoozerBaby:Are you able to get a cable modem to work under BeOS via USB? If so, I (and many others, I'm sure) would love to know how you did it!
You might want to try this yourself before suggesting it.
There's a reason I didn't mention USB--USB cable modem connections are *not* natively supported under BeOS. It's possible to add this functionality to BeOS, but I haven't heard of any third party who has made this possible. If anyone's added USB cable modem support to BeOS, it's news to me.
USB connections should probably be avoided with cable modems in general anyway--especially if you're a cross-platform user (like most BeOS users). For a start, this isn't supported under BeOS (and many other platforms as well!), some chipset manufacturer's USB implementations (I won't name names) are either kinda dodgy or aren't properly supported, the theoretical maximum throughput offered by USB 1.1 is 1.5Mb/s (this bandwidth is shared by all devices on the high speed channel), which may or may not slow your cable connection (mine is capped at 1.5Mb/s, so it probably wouldn't affect throughput much in my case, but if you're getting much better than 1.5Mb/s from your broadband provider, a USB 1.1 connection might things down a bit), etc.
A few additional notes about BeOS and cable modems:
Most DSL and cable modems will work correctly if you have a supported Ethernet network card. Again, internal modem cards and USB are not supported (although I have heard of people who have gotten internal modem card to work).
Ensure that your ISP isn't using PPPoE (PPP Over Ethernet) or some other unsupported protocol.
If you *have* to run special connection software, you are almost certainly using a protocol BeOS can't handle. The trouble is, customer service reps will invariably tell you that you HAVE to run special ISP-provided software even when you don't. (In many cases, the software is nothing more than a setup wizard that sets your network configuration to use DHCP, TCP/IP, etc. and sets Internet Explorer's home page to the ISP's Web site.) For example, AT&T Broadband reps have told me several times that I HAVE to use their special software when all their software did was enter or verify Windows network settings--something you could easily do manually.
If you use a standard Ethernet connection to a cable/DSL modem with no extra software, you should be fine. Open BeOS' Network Preferences and enter exactly what the ISP suggests or mirror your settings from another OS.