Well i've been using my Mini 10 since July and I love it. The 6-cell battery, although a little bulky, really does give you over 6 hours battery life (with all wireless switched off and screen on the lowest brightness).
I am, however, hoping that Dell give us Mini 10 owners the option of upgrading to 2Gb of RAM and possibly an Nvidia ION Chipset upgrade.
I would recommend using Firefox on your Mini 10 rather than IE, if not because IE6 sucks, but because IE8 is a resource hog on the mini 10s limited resources.
Oh, btw I would seriously consider upgrading to the HD screen, it makes everything look a lot sharper. You need to set the resolution manually in the Intel Graphics utility as Dell decided to set the HD screens to 1024x768 by default.