I have quite alot of games yea, but it's not necessarily the amount of games that's the prob, but moreso how much space/blocks each save-game takes ,,,
for example ,, SSBB uses a whopping 128blocks, Eledees & Line Rider - also over 100 blocks, Guitar Hero series, the Fifa & Madden games also very high ,,, off the top of my head I can't remember all of them but it doesn't take too long for the limited 1800 or so blocks of Wii space to be used up. Wouldn't be so bad if all games were set to 1 or 2 blocks.
Even worse is that some games such as SSBB do not allow you to 'copy/backup' your data to the SD card using the standard wii menu data management options, so they're stuck there ,,,
yet the savegame manager tool will let you copy the data back and forth to an SD card, alot faster I might add ...
Ideally if this process could be 'bolt-on' to the front of a game-loader, so the data is copied automatically before the game load then there wouldn't be any limit (aside from the size of your SD card)