in inc/VIEW/collections/_blogs_general.form.php, change the 12 to an 18.

        $Form->text( 'blog_shortname', $edited_Blog->get( 'shortname', 'formvalue' ), 12, T_('Short Name'), T_('Will be used in selection menus and throughout the admin interface.') );

Then you'll have to change the column in the database to have a longer length. Keep in mind that this will cause problems when you upgrade.

Personman, can you please elaborate why changing the Databases' Short_name character length number will will cause problems when you upgrade?

Thank You!

The upgrade script may put the db back to the way it was originally, cutting off your longer blog names.

OK, so upon upgrading I'd just have to remember to redo the operation to keep the longer "short name".

Step 1: Change /inc/collections/views/_coll_general.form.php

Step 2: Change char_var from 12 to higher number in short_name database

More information for those interested is here:
http://forums.b2evolution.net/viewtopic.php?t=3861&highlight=change+short

Thanks Personman!

NB: I'm using version 2.4.1