I use google docs (er...drive) and it has been fine for me. I only need basic info so I do not end up with duplicates. Drive also supports crating links for sharing to the world. Do you like SortItApps b/c of the scanning(my PCB's do not have barcodes)? Does it have prefilled database with game data (release dates, meg size, company, etc)? Does it have imports? Any more details you can tell us about it?
I also use VAPS, Atari Age, Daisakusen for my detailed data using external links from the spreadsheet.
it has a prefill info for scanning but is reliant on the database it uses but work great on my megadrive, 360, ps3, ps2, psp and platstation 1 games. you can add the info you were saying but does not have meg size that would be a good edition and if it picks up nothing you can add all the info your self then go to Google image's for box art, screens shots and stuff
its free to use just no offline caching in the free version and if you buy it you can export to excel for a dame detailed spreed sheet but to no option to import.
yea there is plenty of apps for this but to be honest ones i have tried have been lacking in a lot of things, this one is pretty dame good best i have seen and its free give it a try nothing to lose.
There website has got the a collection database for just about any collecting.