The best part is that I can also share my "webmixes" with others through a simple link. I even used a "webmix" for a recent Professional Development workshop on literacy and technology. (Click here to check it out: Casey PD)
My tiles are tabbed and include educational technology websites, classroom links, and professional resources. And again, they're all in one place -- easily editable and organizable! You can also access from any computer -- simply log in on any device with internet access.
Like any of the new Web 2.0 tools, there seems to be several levels that offer different accessibility. The SymbalooEdu site has a free version, as well as various subscription options -- obviously with added features as the price goes up. So far I have been fine with the free version.