I have imported a database about 800mb as an uncompressed text file (I uploaded it Gzipped mind you!).
I uploaded the file gzipped to a folder on my site. I then unzipped it and used a little script that imported the database 20,000 lines at a time until it was done (around 9 million lines in all I think it was).
Anyway, enjoy:
http://www.ozerov.de/bigdump.php