Well at first glance looking at the exam topics for each of the exams there does not seem to be a massive amount of change. Each of the exam numbers is incremented by a single digit however the core topics remain largely unchanged.
From converstaions with various people and reading the forums such as CLN the biggest changes are updates due to code. Also how Cisco are approaching the exams is alleged to have changed in some cases quite a lot which could add to the fun.
One of the difficulties I had sitting the CCNA Wireless was remembering how things used to be done and as an entry level exam many candidates will not have seen the older code versions. I think the refresh will make a much fairer environment for the candidates however there is one major issue, no study materials.
Its been a major gripe of most candidates taking the Cisco wireless exams that there is scarecly any training or self study material. Pretty much the same for any wireless vendor exams actually! Without simulators and the need for hands on you need to be working with the equipment or very wealthy to buy a lab and or take the official traing which will have course materials, or like me determined and prepared to make the sacrifices and buy a lab and spend hours looking through the design guides. OK for me its almost a hobby.
The few books that were about for the CCNA Wireless will now be well out of date for the new exam. The CCNP Wireless Quick Reference guides will be equally out of date, that said only three of the four promised were ever released, Cisco Press still says the forth, IUWVN,will be released soon and states January 2011, hmmmm OK.
Well I think the core technologies are still relevant OK we have to forget about LWAPP now, that seems so long ago and think CAPWAP. New features like CleanAir, MSE replacing the Location Appliance etc. Largely I think alot of great information is still contained in these publications and they will help analyse your weaknesses. Once you know your weaknesses its into the design and deployment guides.
Good luck anyone taking these I have my first CCNP Wireless booked for 3/2/2012 which is CUWSS, this I should pass! Then I will take my IAUWS before the end of the month, I really want to get this before I have to start thinking about v2. I migh even dabble in v2 to see how different they are.