Here is another vote for SQlite support. SQlite would complement MLF wonderfully, as they are both small and easy to manage. I am quite sure that SQlite database would be able to server 99% of all MLF forums out there, and also it would be dead easy to install for the novices. Recently I started to covert a number of my sites to SQlite and it works like a charm. However I do understand it may not be high on the priority list, but it definitely something to consider.