[AE Thanh]

I have all three devices too (MBP, iPhone, iPad) and I have 3 different contexts for those too.

@Mac = MBP (for all the hard work)
@Phone = iPhone (mostly phone calls, texting)
@iPad = iPad (mostly reviewing and reading)

I use all those devices on a daily basis and I just recently added @iPad. What works for me is that I added @reading and @writing too since those are two contexts I can use all these devices. These aren't true contexts in GTD's definition, but they work great for me.

For example, I use Kindle, Evernote and instapaper a lot. I write a lot in evernote, which I can do on all 3 devices, so I use the @writing context. I also blog a lot so I use that context too. For instapaper and kindle, I use the @reading context because I can do those too across all devices. What I do alot is when I'm on my MBP and I come across alot of articles, I instapaper it and then read it later on my iPad or iPhone when it's more convenient.

Although for this to work you usually want to have some sort of cloud working for you because I hate transferring data, like emailing myself.