Whether Twitter is at some point going to launch (or buy) a desktop client is subject to speculation, but it’s clear that their web and mobile clients garner a lot of the startup’s attention right now. A new hire reflects that.

Overseeing Twitter’s products, and primarily its web service, will henceforth be the task of Kevin Cheng, formerly Director of Product Strategy at Raptr, a social network for gamers. Cheng previously worked at Yahoo!’s Brickhouse incubator where he designed Yahoo Pipes and Bravonation, and at Yahoo! Maps, Yahoo! Local, Adaptive Path, and Trilogy.

Cheng last night tweeted a link to this blog post, in which he shared the cover of the offer letter he just signed: