I am having so much fun with tagging. I find myself "trailing" the gurus in my field of interest and this has become a learning experience all in its own. For instance, I add the gurus or collegues that i know are as passionate about education/technology as me, to my network ,and they do the same for me. We then post good bookmarks to one another or I create a rss feed to their tags which keeps me up to date effortlessly.
I find that instead of Googling something, I first go and check what my gurus have tagged "for me" and it is ALWAYS more relevant than anything that Google can dish up for me! And it comes with their own personilised descriptions...
A primary school teacher at a workshop yesterday told me about in instance where her kiddies googled "hitler" and then stumbled on a porn hitler site. So I suggsted that she set a hitler tag with which means that she has already filtered the sites her kids can look at...