I'm transferring wirelessly by setting up Calibre as a catalogue in Aldiko and using the Calibre server. Name the catalogue whatever you want (I always use Calibre) and then enter the catalogue url.
Use this format: http://xxx.xxx.x.xxx:80xx/stanza
xxx.xxx.x.xxx is your IP address (I got a little app through SlideMe appstore called "IP Book" that tells me what my current IP in use is)
80xx is for the port Calibre uses (usually 8080), you can check that in the Calibre preferences in the Sharing over the Net menu.
My last 3 digits of the IP change regularly so each time I set up a new "catalogue" I am leaving the old one there to re-use later.