Several versions ago the SQLite data layer stopped working so I stopped making releases with this data layer. When I first implemented WebParts in the MyPage feature I never could get the SQLite version to work correctly because I was having trouble getting the blob data in and out of the db due to some issue in the Mono.Data.SqlitClient library which we were using for data access with SQLite.
Not long ago the Mono team revamped a new library, Mono.Data.SQLite, to support 2.0 .NET data access with SQLite and the old library is no longer recommended for use. Yesterday I was able to repair the mojoPortal SQLite data layer by switching to the newer library and doing just a little re-working of code in a few places. The best part is that blobs work well using the new library so I was even able to get WebParts working with SQLite.
The fix is in svn trunk now for anyone interested and next release we will include a package for SQLite. The interesting thing about SQLite is that it only requires a tiny dll and file acess to work. So for instance it should be possible for me to distribute a db already populated with default data with no need for any database setup. Pretty cool! Of course for a real web site I would still recommend to use one of the more robust platforms to get best performance.