Until April 11, if you ride on a (M)etro Bus and ask for a Day Pass, they will give you a loaded TAP card (they will cost a one-time fee of $2 afterward). Keep This Card! you will be able to re-load it for $5 every time you go to a (M) ticket machine or on your next bus ride. No more fumbling for change and holding up the line to get into the bus (well, unless you pay for your $5 Day Pass with coins...)
And then you can do the cool stuff like this:
Actually, as an experienced TAP user, the Militant strongly recommends that you do not even have to take out the card. You can keep it in your wallet or purse, just as long as you place either of them directly on the TAP target. The Militant personally puts his wallet over the target and it does the beepy thing. And if you're slick enough, you can even keep your wallet in your pocket and plnt your ass on the TAP target...okay, the Militant wouldn't recommend that (especially on the bus), but it may or may not work when you have to rush to your train. TAP cards use an RFID chip embedded into the card to tell its value and to easily track ridership figures and patterns.
The regular monthly, senior, disabled, college and K-12 passes are all TAP-capable. Next comes the big test: TAP cards for cash fare riders, where riders can prepay a certain amount and have the appropriate fare cost deducted when they TAP. This is all part of a years-long program to eventually get all Southern California transit systems TAPpin.
So Stay Militant and Get TAPpin!