I am new to Ubuntu and Linux; have heard and read many good things about Ubuntu. My 'OLD' lapt top was running WinXP media center with sp3. I had all but given up on the dinosaur so I decided to give Ubuntu a go. After a week of using a bootable pen drive I decided to go for broke and installed 12.10 as the only OS. I have had very good luck 'AFTER' I started using gnome with no effects. I beleive Unity is to resource hoggy for this ole beast!
2 Gb memory
40 Gb hd
Intel Celeron 1.5 Ghz
Hope this helps others with antiquated hardware