You won't find a nice list of features for the 192 boxes the NTIA thinks are out there. If you mean you want to know what boxes have these features separately
, the only relatively accurate list is for the APT feature. The NITA's list of CECB-eligible boxes marks APT boxes with an asterisk.
Except for the fact that somebody recently messed up the Wiki columns, that is about as good as it gets for a comprehensive list identifying Smart and S-Vid features, as these are popular but uncommon features generally mentioned in the rarely existent market specs. Once somebody fixes the offset data, Wiki columns are fully sortable; click on the symbol next to the column header. You'll likely find decent data on the popular, readily available boxes. It's sure more than I know, since I haven't kept up. A lot of the "unk" crept in when the NTIA did not distinguish between available and vaporware. The NTIA is still is not entirely right about availability.
For event timers, your choice is Dish TR40-CRA/DTVPal/DTVPal Plus, and Zinwell Zat 970 and (I think) 950. If those Zat model numbers have an "A" at the end, they have APT.
The Smart antenna needs some product maturation. Or some would say, some product. The one on the market has mixed reviews, others in development dropped out or have been silent. The skeptic in me decided that by the time the bugs are worked out, the interface will have changed.
That, and we'll all have HDTVs.