There are things to love and hate about the Compaq Mini. Let's get the bad stuff out the way first. The battery on this netbook is pitifully bad. It will power the netbook for around two hours (on most battery settings) which is limp in comparison to almost all major netbooks. The webcam is quite poor, I tried it out yesterday and everything was too dark even when adjusting the settings via yahoo messenger. The hard disk is audible and there can be a regular 'click' noise - this has notably reduced over time (or perhaps the background noise has increased). There is no VGA port! Though you can buy a VGA dongle from HP that fits into a proprietery expansion port (they should really provide this in the box). So while the Mini looks like a business netbook it isn't meeting a basic business need (connecting to a projector). The VGA dongle still isn't available yet. It has a headphone/mic combo port though how well this works I don't know. The Mini does have a decent built in mic though.
The good bits of this netbook almost make the bad stuff disappear. It arguably has the best keyboard. Many of my friends have netbooks and have found the keyboard on my Mini very enjoyable to use. The screen is wonderful it is very vibrant and bright. It is really light (1.1Kg) and thin so is very easy to carry around. Surprisingly for a netbook it also has a decent speaker (which is built into the hinge), so coupled with the nice screen makes for pleasant watching of video. The design of the netbook is also great, it is beautiful to look and and feels reasonably solid for a cheap device.
I've been using the netbook for creating e-learning content and can report that it happily handles Flash and Dreamweaver CS3 as well as the fairly heavy Aptana IDE. It runs the standard apps like office, visio and project well. I'm very pleased, though should point out that any similarly specced netbook would do the same so it's not something unique about the Mini.
I've read that these netbooks can't handle HD video but have to say that I've been watching a number of HD tv shows in DivX format and it has done fine. I'm not an expert on HD video so can't say it'll run every HD format without issue.
If you are thinking about getting a netbook I would recommend that you do some research on the web. I've found a number of 'portable' applications that run very well such as portable VLC (video player), Thunderbird (e-mail), Audacity (audio editor), Firefox (all from [])and Opera ([]) that run very well.
I also invested in a Sandisk Extreme SDHC memory card and a great program called eboostr that lets you use a usb stick/memory card as a cache device and that has really helped the performance. Upgrading the RAM to 2GB is also a good idea.
All in all the Mini is a nice little netbook with pros and cons. If you need a decent built in webcam, battery (though an extended one is out soon), VGA port is important then you might want to give the Mini a miss. If you need a decent screen, great keyboard, lightweight, well designed netbook then I can really recommend this system.