In my site I have found that tags are an effective way to categorize content. I am using the comma seperated tags feature which I think is very useful in that it allows for the creation of more content rich topics.
I have noticed that the snippet google uses for my tag pages are identical and match the sidebar content. This makes sense as there is no meta description or category description on the tag pages.
I also notice that the comma seperated tag urls end up with a + between words. I attempted a few work arounds with .htaccess
RewriteRule ^tag/(.*)\+(.*)$ http://example.com/tag/$1-$2 [R=301,L]
but the questions list does not post I assume because the core uses the url to get the question list.
Any suggestions on how to make the urls more friendly, add meta descriptions and on page content that is unique to each tag?