Someone asked in the comments about sizing up the five hour baby sweater by using bulky yarn. I probably wouldn't do it with bulky yarn since it is such a tiny sweater. There are some really nice patterns for baby sweaters available for free on the web. Kristi Porter's patterns are a favorite of mine.

Here's a quick list:
Domesitic Sphere Free patterns - Kristi Porter
Knitty - Haiku - Kristi Porter
Knitty - Duo - Kristi Porter
Knitty - Baby Norgi - Wendy Johnson
Knitty - Easy Breezy - Gunilla Leavitt
Knitty - Childhood - Natalie Wilson
Knitty - Daisy - Stephanie Pearl McPhee
Rebecca Online - Cute sweaters on the free pattern page
Striped Sweater - Nancy Hearne