both the mini 210 and dell mini 1012 are good buys - a couple of observations:
1. the top end of both cost around 20k (2 GB RAM - 320 GB HDD for Dell, 250 GB for HP)
2. Touchpads for both suck - maybe HP is slightly better (IMHO better to use an external mouse when not in move)
3. Battery for both (provided both are 6 cells) lasts >8hrs with normal usage like surfing via wlan, music etc. Note HP often bundles a 3 cell battery so please check for specs
4. Dell has a broadcomm accelerator card for the top end sku (1336x768 HD) screen- not mentioned in the website but is there. I got one this saturday nad it plays 720p and 1080p smoothly - too bad that they dropped the HDMI port in this one. The HP IMHO does not come with either the HD screen or the broadcomm accelerator card (you can check going to device manager in syntem control panel and check under sound and multimedia for HP at any shop. the dell itop end sku is not available at most places but you can take my word for it - have the invoice to show it and was surprised by it and then checked the specs in the device manager when an unknown device called broadcomm was billed)
5. HP has a instant startup OS which Dell lacks - it can help for instant email, msgnr, music etc - though I woudl say the Dell mini takes arond 30-40 seconds for bootup which is decent - from then onwards it has substantial punch to drive normal usage.
6. You can try to underclock the HP which is unavailable in the Dell through the Bios - can squeeze some more mins from the battery but for me 7-8 hours is good enough.
I waited for 2-3 months doing my reseacrh and finally booked the top end sku from Dell with 3 yr CC program (necessary with an infact running around) - bonus was the broadcomm accelerator card that Dell packed along.