I am very tempted to buy an 11" MBA (1.4Ghz, 4GB RAM, 64GB HD)  for travel.  The 15" is great but just not very portable.  I would basically use this for web browsing, responding to emails, watching netflix, and LaTex.  The Ipad is nice but sometimes I forget to keep my work computer on and then I cannot Tex, etc.  Also, the Air would be smaller than a keyboard + Ipad.  The question is whether I should wait to find out if it gets a faster Sandy Bridge processor in June (or whenever this is supposed to happen).  I guess the battery life may go down with the new processors though.  Any thoughts besides get both? 
 
Also, anyone frustrated with the speed of the Air using some applications?