Right now, the website where I work is hosted on two first-generation HP DL585's. They're big, loud, power-hungry comic superheroes, and I love them.
Having come from hosting on Dell hardware, HP is an absolute nerd dream. Unlike Dell servers, which tend to be made of customized commodity components, the internals of HP servers are full of thought and cleverness and custom engineering. Everything slides perfectly into place with little handles and arrows and lights and everything you need to feel confident when you're mucking around the insides of a pricey server. And HP's lights-out management tool (iLO) really does make visiting my servers unnecessary. With my Dells, I spent a few hours a week at my servers' colocation site. With the HPs, I physically touch these servers maybe twice a year. Even if the server's CPU is spiked and completely unresponsive, I can hop on to iLO and reboot the thing or get its network connection back up, etc. The web-based management interface even works on my Mac (even when Java is involved). Trust me, that's saying a lot.
You should know that I love researching, specking out, configuring, and installing new servers. To me, servers are the the sports cars of the nerd world. So sadly for me, I did too good a job with these DL585's. While the servers are three years old, they're still perfectly capable of handling the task they're given. Back in 2004, I spent a lot of time calculating how we'd engineer the system: how big and fast the disk and CPU would need to be, the best RAID to use, etc., and then we spent a lot of money to get a system that could live a long time. The good news is, all that planning paid off. The bad news is, all that planning paid off; I have no reason to buy new web servers. And I tried that whole asset-depreciation trick -- our Controller wanted no part of it.
There's great new server gear that has come out in the intervening years, but I'm pretty much watching it from the sidelines. Perhaps most interesting is the rise of blade servers. They were around in 2004 when I was putting our system together, but they were a bit bleeding edge and out of our range both technically and financially. Not anymore. The HP c3000 "Shorty" enclosure looks like exactly what I would use if I were putting together a web farm today. Easy, lego-like racking. No need to bring along skinnier staff people who are agile enough to get at the back of our servers. There are tons of blade choices, with easy and obvious integration. No cabling hassles.
There are blades for everything. Want Opteron? Yes. Intel? Of course. direct-attached storage? No problem. SAN? Yep. Even backup tape drives. The management is all centralized, and it has a cool LCD panel in the front that lets you bootstrap the enclosure and do health monitoring (it's designed for branch offices, so you can see a virtual version of the panel in the web interface).
When I've researched blade systems in the past, there were all sorts of strange questions leading to seemingly consequential decisions -- about the backplane, etc. Not so with the c3000. It doesn't seem to have the kind of pitfalls or hard choices a small shop like ours can't afford to get wrong. I'm sure it trades in some flexibility, but with the benefit of making blades a real option for us.
Of course, this is all conjecture. Unless traffic to my company's website suddenly quadruples, I won't have my hands on a c3000 for a few years. Maybe an enterprising HP product manager will read this and take pity on me and offer to trade me two happily chugging DL585 G1's for a stocked c3000. Hell, I'd even blog about it.