According to documents filed yesterday with the California Northern District Court, Apple has launched a patent infringement lawsuit against Sanho Corporation the maker of the HyperMac product line of products. The details are very sketchy at the moment as the documents are non-specific as you'll see in the filing documents in this report. The actual "Complaint" has yet to be made public even though it's listed as being filed. An update will be provided for when and/or if further details are made available.
The presiding Judge in this case will be Howard R. Lloyd. The other two documents associated with this case were, (1) Standing Order RE: Initial Case Management and Discovery Disputes, and (2) Standing Order for All Judges of the Northern District of California: Contents of Joint Case Management Statement. The document covering case number 5:10-cv-04042-HRL states that the case is indeed concerning "Patent Infringement" under Cause 35: 271.
Update: The Court's Docket Report
As you could see below, the court has the complaint but has yet to hyperlink it so as to make it available to the public. Whether there's simply a court-service glitch or a solid reason for the delay is unknown at this time.