After reporting yesturday that the Acer Aspire One would now come with a 120GB hard drive, that earlier report looks like it was a false rumour (still no confirmation from Acer), as there is yet another addition to the Aspire One range; the Aspire One A150X.
German retailer Notebooksbilliger.de are selling this model for 399 Euros (around £320). It comes with the same 1.6GHz Atom chip and 1GB of memory but the hard drive has been increased to 120GB compared to the normal 80GB model. Windows XP pre-loaded.
Another update - this site has now just updated their entire Acer Aspire hard drive models to the 120gb versions as well, so maybe this will be final now.