+44

When Your Heart Stops Beating +44 formed in the wake of Blink 182's "hiatus." This new band featured Mark Hoppus and Travis yet again on drums (he was in Boxcar Racer, too). Of the various Blink 182 offspring and side projects, +44 ended up sounding most like its predecessor. They also represent the only project to realize that moving on from their past work didn't mean they had to forget about it completely. Said Corey Apar of allmusic.com:

On their debut, When Your Heart Stops Beating, +44 has managed to balance out upbeat rockers and somber introspections to create a record that is thoughtful and composed, yet fun, and almost like the album blink could have made had they stuck together.

There are some electro-pop elements and softer songs here that prove Mark Hoppus' worth as a pop song writer, and validating in the process his newfound success as a producer for such bands as The Matches, Motion City Soundtrack, Socratic, and New Found Glory.
Here's a song from the album which actually attacks Tom, who at the time had finally formed his new band, our next subject, Angels & Airwaves:

	(+44) - No It Isn't
	Found at skreemr.com