One of my gripes with Lisp is that there is not an easy to use package installation utility like, for example, Ruby gems. Common Lisp does have ASDF, but I get a lot of "misses" trying to install and experiment with Lisp programs using ASDF.
The continuation based UnCommon Web project looks interesting, but has been a pain to install all of the dependencies until now. Marco Baringer has packaged UCW and all of its dependencies in a single tar file so for me the install was very quick, and I could experiment with UCW painlessly. Thanks Marco!