I use only free servers and after creating my website: http://pundaquit.republika.pl I decided to make access to that domain by simple domain name . I decided to use domain alias http://notlong.com/ service and have simple domain name http://pundaquit.notlong.com
The second advantage of using alias here was to be independant from my file host which I will have to change.
I haven't found a better alias service like notlong, because notlong.com is easy to remember. After that I encounter many problems:
* most of forums or social services treat notlong adress as a spam,
* Bing so far hvn't accepted http://pundaquit.notlong.com domain and others.

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Is it another way to have good free domain name? How about the situation when your hosting server will inform you to expire? Only a lasting layer of domain aliases make you independant from the real file hosts.