First question is fairly simple: currently there's only the strange sapper that's out from one of the two new crates. We're hoping they put some more sappers in (there's been talk on the spi forums about a throwable sapper that does an AoE sap, but kills things slower for example), but there's been nothing said for the time being.
Second, as for your statement Kaz:
http://forums.steampowered.com/forums/showthread.php?t=2611566
Obviously not official yet, but something even *I'M* interested in seeing despite not playing engy much. :O