One word: racoomba.

Other recent neologisms I've been amused by:

• twitches (n): your posse on twitter, e.g.: later, twitches! (from drewm)
• sobculture (n): A subculture the very existence of which makes people cry. (from neologasm)
• amalgorithm (n): An algorithm comprising several weighted algorithms that perform the same purpose. For example, search engine ranking algorithms. (ibid.)