There are a couple of games on Kickstarter right now that may be of interest. The first is Trick of the Rails
, a short card-based game that seems to have some flavor of 18xx. I backed it - it's only $16 including shipping, so it surely is worth a try.
Secondly, Mecury Games is reprinting Princes of the Renaissance
. I have no intention of letting my original copy go, so we'll have it to play, but I thought it worth mentioning. I don't expect to go for this reprint, as I don't think it adds anything to the original.