Is FTPii slow for you too?

Not to bash the application. I think it would be extremely useful but in my setup, it took me 4 minutes to transer a 32MB file from the Wii to my PC.
When I tried to transer a 12MB file from the PC to the Wii, Windows predicted 6 minutes but timed out part-way through.

Are there any tweaks that can be made?

32megs in 4 minutes over wireless isn't too bad...

Nominal speed of WiFi, 802.11g protocol: 54 Mbps ~= 7MB/s
Real, medium speed of 802.11g: 24 Mbps ~=3MB/s
YOUR medium speed for the transferency of that 32MB file: 32000KB / 240s ~= 133KB/s ~= 1Mbps/s

Yeah, pretty slow. But don't forget, Wii WiFi is Crap®.

@TheManual:

Is your wireless connection even 802.11g?
(the final letter is the important part)

My WiFi router is 802.11g, indeed.
On more recent, properly timed tests I've achieved close to 550kbps.
It is what it is, I guess.

It's still very useful for quick update of settings files, adding a few files here and there, etc.
I still have to pull out the card for backing up and transfer of huge files which is OK.