I've got a bunch of series on the go right now, and it's only going to get worse when my Zeta Gundam boxset arrives at the end of November (hopefully)
Last Exile - Really good, one more disc to go
ROD The TV - Really good
Gungrave - Only seen the first disc, but it seems very interesting so far
Gundam Seed - Typical Gundam stuff, and another cheap "reimagining" of the original series. The character designs are terrible, unfortunately.
Ghost in the Shell Stand Alone Complex - Occasionally good, but plagued with the same problem all the Ghost in the Shell products have, ie: rambling technospeak. The theme song is amazing though
Ikki Tousen - Uh... I'm watching it for the articles. Yes, that's it.
Mezzo - I've only seen the first episode so far. The action sequences are the best I've seen in a long time