Well.... you didn't mention if this was to be used for a PC or some other device. If you're into installing Linux onto something tiny, Transmeta offers Midori Linux. Yes it is open source and you can get it here.
This is not intended for a PC.
http://midori.transmeta.com/
As far as PC use, someone managed to get his Toshiba® Libretto? - (L1/060TNMM, L1/060TNCM) to work with Linux, although it's in French.
http://www.vidovic.org/augustin/pages/l1/
Sorry if this doesn't help.
