Very funny, guys. =P
If you want to download beatmaps into the game...
- Download the beatmap in the beatmap listings, then open it with osu!. Or, you could just put the ".osz" file into the songs folder, and osu! will automatically extract it.
If you want to upload beatmaps to the site for people to look at...
- Go to edit mode and choose your beatmap, then pick Upload Beatmap in the File menu. Pick Standard Submission.