Something like:
aviatordiary.com
flyjournal.com
Found this using the intelligent search on Easyspace:
http://secure.easyspace.com/shop-cgi-bin/easyspace1.cgi
Type some keywords and their thesaurus will do the rest.
It says that pilot.gb.com is available.
hth
Charles
Let us know the final choice - are you going to do a blog style site?