It's really been over a year. I've got to get better about this.
My tyranids have stalled out and I'm currently working on my Genestealer Cult. I've had a few games with these guys in 7th edition and I'm impressed with Games Workshop's ability to make interesting and new rules. Cult Ambush is a blast, and the backbone of the army (Acolytes) absolutely shred in close combat.
So far I've got to assemble/paint:
70 Neophytes
65ish Acolytes
20ish Metamorphs
8 Aberrants
4 Magus
6 Familiars
1 Patriarch
1 Primus
2 Iconwards
1 Goliath (for now)
20+ Genestealers/Purestrains