The stadium NOTAM, Disneyland/Disneyworld NOTAMs, etc. are clearly described on pages 238 and 239 (1-GN-13 and -14) of the 543-page Notices to Airmen Publication (NTAP), the contents of which every pilot -- yes, each one of us -- becomes familiar with prior to each flight, in accordance with 14 CFR 91.103, right? ;-)
The NTAP is updated every 28 days and is available as a PDF or in HTML format at
http://www.faa.gov/air_traffic/publications/notices/.
If you have an iPad with ForeFlight, you can add the NTAP to the "Documents" section of ForeFlight and it is automatically updated every 28 days when you download your chart updates. ForeFlight Documents has a "search" feature so it's pretty easy to pull up the NOTAMs related to the airport(s) involved with your flight. Check the General NOTAMs for anything new if you haven't flown in a while. (I don't know about the other EFB products; I just happen to use ForeFlight myself.)
NOTAMs that are included in briefings eventually make their way into the NTAP after a certain period of time,
at which point they may be removed from the briefings! Once in the NTAP, FSS will *not* tell you about them unless you specifically ask for them. And in any case, FSS has no idea about event schedules or when a stadium TFR is active, and you can't rely on ATC for that information either. Doncha just love it?
And now a little story. A buddy and I were flying up along Chicago/Lake Michigan a few years ago in a G-1000 equipped airplane that had an XM/WX subscription. Before the flight, we got a briefing over the phone from FSS. During the flight, we got flight following from Chicago Approach. Nobody mentioned any TFRs. As we approached Soldier Field from the south, the G-1000 displayed a TFR around it .. and we were headed right toward it (with ATC approval to fly up the coastline there)! If I remember correctly, the XM/WX service actually provided game information and estimated times that the TFR would be active. I understand ADS-B (or is it the EFIS providers like Advanced Flight Systems?) plot stadium TFRs but they're just always there -- no game or "valid time" information.
P.S.: I guess an armchair lawyer could argue whether 14 CFR 91.103 really requires one to become familiar with the NTAP, since the NTAP is not listed in the "must include" section of that paragraph. But I think most would agree that pilots should be familiar with the NTAP, even if most of us probably are not!