They dropped my service twice yesterday and so far once today.
For some reason, traffic just stops flowing and nothing short of rebooting both the cable modem and the server will resolve it. The cable modem seems unable to re-establish the flow of bits to the external interface and using dhclient(8) to try dropping and requesting networking configuration information seems to fail.
Time to look into DSL, perhaps.
<update @ 2240> I hate Comcast even more. Service just went out again.
Customer Care sez they’ll swap me a new modem if I bring this one in. After four years, I suppose it’s likely to be past it’s sell-by date. DSL is still a possibility, if I can get a good deal. Speakeasy, beloved as they are, cost even more than Comcast and I’ll never be able to sell a more expensive service to the Powers That Be.