Hey there's a Torrent app called Meetor that you can find on N9-apps.com or ovi store, it'll cost ya a couple of dollars though.
I haven't tried it so not really sure how good it is but the screen shots on n9-apps.com don't look half bad.

im currently using this, its quite ok but the thing with it, you cant download multiple torrents at the same time, the ui could be much more intuitive though, i hope an update is still to come.

Have a look here http://www.n9fanclub.com/ there is a lot apps.for n9 and it is a freeeee

hi

I did built libtorrent and xmlrpc but rtorrent failed , pm me if you wanna help
aria2 would suit too

Please look at MeeTor. I have tested it myself and it works great. You can also find in the comments how to apply the correct mime-type to N9 browser.

I'd like to also mention that n9fanclub provides pirated material, so please support the developer and buy the app from Store. The developer is a good guy and has also promised updates to the app.

MeeTor is no longer available from Nokia store. Is there any other way I can get it? I don't mind paying for it.

There's also an app but i didn't tried it
Torrential
https://www.box.com/s/e8ehotihm11w9vay7uyl

how about transmission remote for harmattan??? just search for it...
works great!

Yes, transmission remote works great! Used it for lots of torrents without an issue. It uses a lot of resources so it does make the phone a little sluggish every now and then. Plus, remember to select "end local daemon" before you close otherwise it will still run in the background and consume battery/resources.

There is an app on the store called Torrential, its free and works pretty well :P