There have been a small handful of transfers this week, mentioned hither and yon in other threads, but with one more happening it's time the subject got its own post.  All young kids, so adjust your expectations realistically. The data:

Jan Ghyselinck to Columbia

Ghyselinck seems to be something of a cobbles guy. Racing in Belgium, the 20-year-old has bagged wins in the "beloften" (espoirs?) Ronde van Vlaanderen and the Vlaamse Pijl -- the latter by outsprinting his six breakaway companions including the next two names on this list. So, coming soon to an April near you. However, he also ran third in the kids' Liege-Bastogne-Liege, so which half of April remains to be seen. Either way, there's a scent of cobbles ability, climbing and sprinting in there. What's not to like? And that includes his website.

Jan Bakelants to Columbia

I'll defer to Gavia's assessment in the comments:

He won Tour de l’Avenir and just about everything else in sight last year as an U23. I don’t think he’s a super-climber though, more all-arounder. I seem to recall from watching worlds that he was a tall, lanky dude.

Bakelants is two years older and thus further along than his fellow Belgian Ghyselinck. Like Gav suggests, that Tour de l'Avenir is a signature win for a young guy, beating Rui Costa. Unlike Ghyselinck he has no cobbles palmares, but has done spectacularly well in the Ardennes, winning the Circuit des Ardennes and L-B-L Espoirs within a few days in 2008. This season has been spent racing with the big boys for Topsport Vlaanderen, and includes 10th placings at the Ronde van Belgie and Ster Elektrotoer.

Tejay Van Garderen to Columbia

Damn, Columbia love raking in the young talent. It's not like that was a missing element on the team. However, top American talent was an area in need of shoring up, and Tejay Van Garderen might be a future answer. He's having a phenomenal year with the Rabobank U23 team, taking second in the Tour des Pays de Savoie, the signature stage of which finished on La Toussuire in the heart of the French Haute-Savoie Alps. Tejay also won the Circuito Montanes (after taking second last year), a week-long stage race in northern Spain/Cantabria, and the Tour du Haut Anjou in France. He finished 3.13 behind his future teammate Bakelants in the Tour de l'Avenir, I believe I read that he's gunning for a better result this September. Anyway, his climbing and time trial results all look quite promising.

Kenny DeHaes to Silence-Lotto

Odd one, starting July 1. I guess he wasn't enjoying his turn with Katusha. Or he didn't want to pay them seventy million dollars if anything ever went awry with one of his urine samples. In any event, he's off to Silence! where they have openings for anyone who can win anything in March and April. At 24, DeHaes is still very young, though he won a Ronde van Vlaanderen Beloften himself four years ago, so he brings something to the cobbles. This one's all over the media, so I'll stop here.