Well, assuming you're just doing file stuff, one of the commonly available NAS solutions with a box full of disks and multiple file protocols would work great. If you're tiny, your external webserver will be at dreamhost or something (I might have said GoDaddy here in 2008), because you're not going to have a real network connection. More likely your network will be on par with your server equipment and it'll be a cable modem or DSL. Personally, and this has been my business niche a LONG time, so I hate to say this, but if you're under 25 employees, you can get by with just a great internet connection and Google or Windows Live or one of the other cloud apps services. If, and this is a big if, you don't need the data to do your work. For instance, if you're a plumbing company, and you can just do the work and then account for it later with paper slips or something, cloud apps are probably reliable enough.
The thing is, Dell and HP were never in this niche in a big way anyway. I mean, Windows SBS (Small Business Server) never sold many units, and it was designed to be a single server OS in a small office. I think what's really going on is that we've been in a recession, and so big companies have been buying fewer servers. Secondly, computers have gotten too powerful for the standard business workloads and if you combine this with the tendency over the past few years to do horizontal scaling in the CPU (i.e. more cores, not faster clock speeds), you have a lot of unused capacity if you stick with the old "one server per service" mantras. So, people have been virtualizing, building the "private clouds" where you have fewer more powerful hardware units and you split them up in software.
What's crazy is that this has been IBM's like bread and butter since the late 80's when AS 400 and then later zOS came out. For them it's always been about one big hardware unit and cutting it up. Hell, you can go back to the 60's timesharing computers and see "cloud" computing.
So, there you have it. Dell, HPaq have probably been selling fewer servers, and IBM is probably selling fewer due to the recession. On the consumer side, there's obviously Apple to blame for a lot of the desktop erosion, but again, we've been in a recession, everyone who wants a computer probably has one, and there hasn't been a compelling reason or need for new faster hardware.