I've built a 1.7.5.6 firmware with ftp server support.
download here:
standard version:
http://server.zomeronline.net/wl300g...1.7.5.6_en.trx
and an 84 mW version:
http://server.zomeronline.net/wl300g...1.7.5.6_en.trx
login & pw for ftp: admin
Next I will try to incorporate telnetd support.