It has many applications so I bet 2GB will hold just about every application you'll find on the Kubuntu CD and you still have over 1GB to fill up.
I think you'll be fine.
I've given it some thought and done a little bit of reading and decided that I want to convert to Linux. After doing some reading about the differences between the various iterations of Linux, I finally landed on Kubuntu. I also decided to not so much "switch" over to Linux but rather "migrate" over. To do that, I've decided to install Kubuntu on my 2 gig flash drive and effectively dual boot with and Windows.
I was wondering what else I need to know and what else I should put on my flash drive (keeping in mind that it's only 2 gigs so I can't have every program in the world on there (much as I would like that)).
I know this is sort of open-ended as to what I need but I'm not exactly sure what o ask. So, thank you.