I have no clue whether those services are illegal, but anywhere.fm is not the only one:
http://www.mp3tunes.com/
http://www.mediamaster.com/

I second the recommendation for Smart Type Assistant !!
I am using it for the same reason as you said, I often have to write in my blog and it did happened sometimes, that I lost my composed work because of the stupid blog site would suddenly had problems.
Smart Type Assistant  was available several month ago at giveawayoftheday, and its one of the best things I activated and really used since I found that site!
its a great use for a keylogger!