small and quiet but powerful
585793
This is perfect for my desk.  I wish it had options for different speeds but other than that it works just dandy!
174293
If you're looking for a small fan that's pretty loud, this is a good choice.  It's not like other fans; there's no on/off switch, just plug it in.  It seems like a very study fan.  The screws that come with it I used to put the front grill on and they are too long for that, but I think they are to mount it to something else.  But it's definitely small enough to pack in a suitcase if you're like me and need a breeze and some white noise to sleep.
4571839
It works well and powerful for its size.  It's not that quiet as I expected otherwise it will be a 5 star product.
1276198
Small, light, quiet.  The cord probably weighs more than the unit.  It's been a while since I purchased an external hard drive and I'm very happy with how small this is, how quiet and cool it runs, and the storage (1 TB) I received for the price.  It was a breeze to set up both with my Mac (OSX) and PCs (Windows XP/7) and is working split duty as a backup drive and portable file transfer.
4122047
This little fan is far more powerful than I thought it would be and it is super quiet! I bought it to keep my computer cool and it does a great job. It even blows enough to keep me cooled off while at my desk-but not so much that things go flying everywhere. It is perfect sized to fit under a laptop stand.

Update: I have purchased two more, and plan to buy a fourth.
4730782
so far so good this baby has allot of power for how small it is.  The only thing is you really need to empty it after each use other then that seems to work great ive only had it a week but it picks up pennies and bits of old calk so im impressed.  I got it for our rv and its a great size easy to stow away yet still gives you that shopvac power.
114842
Very powerful and light weight, this vaccuum is ideal for small apartments/homes.  Unbelievable power from such a small machine, I replaced our Dirt Devil with this and the carpets and furniture are way cleaner and it takes much less time.

The filter is a little hard to keep clean because of the design, it is hard to vaccuum under low furniture, and the exhaust is in the front of the unit, blowing lint/dust away.
3306737
Powerful little fan!  At first it was so quiet I forgot I even had it on but after a few months of use it  I can hear it a little but I still love it.
786785
amazing for small but powerful "sleeper" PC builds.
small fan is the noisiest part of my system (i`ve already got used to it, but can be a downer if rest of the system is planned silent)
52194
This fan is really small but quite powerful.  I used to have a huge box fan at the end of my bed.  It was LOUD and drove me a bit crazy.  I replaced it with this.  It's not quite as powerful as the box fan, but so much more quiet and really does move the air around.
4596551
This is one great little fan!  VERY quiet, enough to have it right next to you and still watch a quiet movie scene.  It still emits a powerful flow a air, and it has a good solid base, and/or you may use the attached clip on feature. The cord is adequate in length, but that is it's only negative feature, it could use a longer cord.  I love this little fan, it was an unexpectedly great find and purchase!
3964454
Quiet and efficient, moves a lot of air for it's small size. Battery life is excellent especially at low speed it lasts for several hours of continuous use
1264369
After reading other reviews I ordered this fan based on the sound level and it met my expectations....for the size it's quite quiet and has a lot of power.
469525
This fan works great; its smaller than I thought it would be but is very efficient.
2776530
Whisper quiet, runs cool and offers great performance in a small package. I personally use it as a little home server tucked away in my living room. It's great for running modest game servers, a home media server or file backups. I can't stress enough how quiet it is. I wouldn't even know that it was on if it weren't for the LED light.

I've had it for several months now with it powered on pretty much 24/7, no issues to report.

Also, don't forget. You need to get memory and SSD separately! which is pretty standard, but often overlooked.
3489550
Very quiet, keeps it cool, tiny form factor. I wish the cord was just a smidge longer but that's only because of my desktop configuration.
1109669
Great little fan powered by USB. This sucker is quiet, consistent, and small. I keep it on my desk and it fans me when I have it plugged in. What more do you need?