We have got a TP-link MR-3040 wifi routers and installed the custom firmware on it so it will work on iPad ,Android,pc,Mac ,or Linux.
They work well and on the iPad and Android we have jpg and raw pics coming to them for viewing and can save them to the iPad or android change focus and have 5 flashes working in sync I hit capture and within a few seconds I can see the pic.
We use a canon 5D mark 2 and it works great with the App called QDSLdashboard.
With the canon 70 d wifi is built into it so you don't need a tplink MR-3040 wifi router.
Check out the link below.
http://www.iceinspace.com.au/forum/s...ad.php?t=84926