You can use DAE or KMZ, but not skp. If you want to use DAE (said to be the best format for not getting messed up and has many uses, but not the easiest way to export), you could either download the zip file from google warehouse once it's uploaded and upload it here, or if you don't want to upload it you can:
1. Go into Sketchup and go to File>Export>3d Model.
2. From the drop down, choose DAE (Collada) Format. Put the file in the same folder with all the textures.
3. Now you have named and saved your file. Right click and choose New>Compressed (zipped) folder (near the end of the list) and select all the textures and the DAE file, then click on any one of them and drag this one over to the New (zipped) folder with your mouse, and all the other files will go in with it.
4. Go to your 3dvia dashboard on 3dvia.com by clicking on the "You" button up top. Go to upload (on the top right in your toolbox) and choose "basic uploader" link on the bottom left (the new one has seen many glitches before). Now use the buttons to Browse for the file on your computer, set it to public or private (public if you want everyone to see it, otherwise choose private) downloadable or remixable. Set the author to someone else if it isn't you, otherwise leave that alone. Finally, press upload.
5. I haven't tested it in a while, but this may take you to a screen where you get to name and add description to your file. So just go ahead with that...
6. Your file should appear on your dashboard. Now you use the 3dvia mobile app to view it.
In your case:
I would tag all your models with some sort of tag that represents your models (such as: "mydeco furnitures") so people can easily search for your library.
KMZ works much the same, is easier, but doesn't do as well to keep stuff from getting messed up.
1. In Sketchup, go to File>Export>3d Model and choose Google Earth Format (.kmz).
2. Once done exporting, skip to step 4 above.
Now you can view either in 3dvia Mobile using a mobile phone or device.