"ComLuv" is shorthand for CommentLuv, a plugin which allows folks who graciously comment on your blog to enhance their own blog's profile by adding a link to their most recent blog post at the end of their comment. In other words, it allows bloggers to "share the love" by offering something in return for comments. A win win.
For a long time it was only available to bloggers using the WordPress platform, a big frustration for those who are using the Blogger platform.
Now, however, ComLuv is available for Blogger blogs by replacing the Blogger comment system with another comment system called IntenseDebate.
Once you have it set up, your Comments box can look like this:
Pretty cool.