One of the oddities of casting an absentee ballot is that you hand it off, and then hope.
In California, a few counties let us check to see if our ballots have been counted.
Alameda County
Contra Costa County
Los Angeles County (thanks to Cardinal Tiger)
Marin County
San Bernardino County (thanks to DeanDemocrat)
Santa Clara County
San Diego County (thanks to VA2CA)
San Mateo County
If you can, check. Better to be sure your vote got in, and into the tallies, than not.
Mine wasn't counted as of the update last night, but was counted as of tonight.