Apple vs HTC + S3 Graphics http://snapvoip.blogspot.com/
Florian Mueller has drown a battle map of Apple, HTC plus S3 Graphics that entered the same patent fight arena.
These patent law suits be it Apple vs HTC, Apple vs S3 Graphics or Apple vs Samsung are so complicated and I am glad FOSS Patents is there to shed some light on the facts (at the moment it is the only light I have with some sprinkles from other sites.)
In addition the the battle map, which reminds me of circuit diagrams I used to draw and etch during my early college days, FOSS Patents has contents to go along with it.
If you have any interest in these patent issues, FP is a must read.