Hi, just saw this one http://www.amazon.de/exec/obidos/ASIN/B007W7UJTQ/qid=1121784818/sr=8-3/ref=sr_8_xs_ap_i3_xgl ,
it s 36 Euro and does the same than camranger!!!
It does not. CamRanger has a special firmware developed by them. This is just a router.
I found links for USA amazon. and its cheaper for those who live in USA http://www.amazon.com/s/ref=nb_sb_noss_2?url=search-alias%3Daps&field-keywords=TP-Link%20TL-MR3040
I also wonder about what is needed to make it works cable and software? ..um firmware?
EDIT: :)
https://www.youtube.com/watch?v=ltSz92dBbz0
https://www.youtube.com/watch?v=nTKcLILx_F8
http://connect.dpreview.com/post/5836824413/case-remote-smartphone-remote-for-dslr (http://connect.dpreview.com/post/5836824413/case-remote-smartphone-remote-for-dslr)
It s the same, and does absolutely the same.
Chainfire (dslr controller) provides a firmware for it with which you can use dslr controller with this router
http://dslrcontroller.com/firmwares/openwrt-ar71xx-generic-tl-mr3040-v1-squashfs-factory.bin