Latest UPDATE: October 4th, 2014. See also Finding Blogs with Similar Content
There is a search function for wordpress.com blogs and you can see it in action right here. Some bloggers have been seeking tips on how to locate other wordpress.com blogs. There are two other search approaches that can be used to find blogs at wordpress.com and they are outlined below.
(1) Google searches – Here is an example of a search string that will produce results.
[key words] wordpress blogging tips site:wordpress.com [note there is no space following the colon]
indie music site:wordpress.com
By changing the key words you can locate blogs by subject matter and by the site ie. wordpress.com.
(2) WordPress.com global tag page searches – Here are examples.
(3) Once you have located other blogs with subject matter that interests you Tag Surfer then you can type the URL`s of those blogs into your Blogs I follow list and have a feed to them in your Reader or any feedreader that you can check on a daily basis.
(4) Please take note that by failing to assign categories and tags to your blog posts you are making your blog posts “hard to find”. Here is a post that may help you “Promote Your Blog: Increase Traffic”.