The R4 team announced a new plastic casing to be produced with the next batch of R4's (announced yesterday) but that's about it...there's a new R4 coming out also in case anyone is wondering.
Any website confirming what you're saying ?
http://www.r4ds.com/news1-en.htmhttp://www.r4ds.com/news1-en.htmhttp://www.r4ds.com/news1-en.htm