My little guy hit the 22 lb weight limit for his exersaucer, bouncy chair, jolly jumper, and swing by 4 months!! I thought you were supposed to be able to use them for like a year!!
Anyways, it sounds like it's time to babywear or pull out the playpen!
Emily, Lovin' Life with DF Ben, "Em" to super-silly DSS Gage (04/06), and new mommy to Kai (08/07)