Old links are dead, but new links are available.
The offer is no fee the first year and 30,000 mile bonus after $750 in spend.
Of course these cards are churnable.
Different folks have different experiences with how many cards you can get at one time, and how often you can get the cards. It varies more or less from one card every 60 days to some folks simultaneously applying for several and getting perhaps four at a time. (Frugal Travel Guy says to open up multiple applications in different browser windows at the same time, and hit submit pretty much simultaneously on each.)
Grab the card, meet the minimum spend (Presidential coins, anyone?), watch your bonus post. After six months or so call to cancel the card, certainly before the year is out, and then decide whether they make you an offer which causes keeping the card to be worthwhile — nothing that you can probably only have 7 or 8 Citicards at any one time.