Class Speeds on SanDisk SDxx Cards

Has SanDisk every made Class 2 (2MB/second read) SD cards?

Is there a table that shows the various speeds of SanDisk cards and whatever sysbols identify the speed?

yes, sandisk has made class 2 cards in the standard and ultra line but all were recently bumped to class 4. each line i.e standard, ultra, extreme have different specs.