Apperantly Lenevo, Huawai and ZTE have expressed interest, but I for one am especially rooting for HTC. They do great hardware (e.g. my old Qtek 9100, my current HTC Hero and Google’ Nexus One) and they have exprience with a multi-OS product line (Windows Mobile and Android). But most importantly; they have Sense UI!
Sense is the user interface that HTC puts on top of WinMo and Android, to provide users with good looking, easy to use home screens that feature widgets to display e.g. calender, mail, clock, weather, but also information from Facebook, Twitter and Flickr. WebOS could really help HTC broaden and deepen Sense; e.g. by porting the WebOS multitasking cards metaphor, Synergy (unified contact list, deeply integrating internal sources and social web) and the nifty notification system. And Mojo could (easily?) be ported to WinMo and Android as well, HTC could then open up Palm’s App Catalog for all HTC WebOS/Sense devices, allowing developers to create, publish and sell mobile applications for multiple operating systems!
Picture all of that and all of a sudden you’ll see a major player that has the hard- and software and the experience to challenge Apple at home and abroad and in court with great hardware and, thanks to WebOS, even greater software. Go HTC!