Why not use Midnight Commander's inbuilt FTP client?
I have 4.8.0-pre1 on my N900, works beautifully.
There's 4.7.0.9-2 in rzr's repo, it might have a broken FTP support though (it connects but doesn't list dir contents), you'd have to test it yourself.
I made a quick & dirty non-optified deb of 4.8.1.3 just in case, should work just fine -- it depends on libslang2 which is available from the official repo.