My understanding from reading many forum messages here, is the that the B130 does not have an internal antenaa for internal wireless adapter unless it is shipped with the wireless adapter. Installing an internal antenna afterward is difficult. Furthermore, the B-130 has an Express card slot instead of a PC card slot. That eliminates that use of PC card wireless network cards, and Express Card wireless network cards have not yet been released. That leaves your only choice - a USB wireless network adapter that would plug into one of your USB ports. That should get you wireless access at the library.
I have the B130 it came with an Dell Wireless 1370 Internel wireless (802.11b/g. 54Mbps ). That was inculided in the price. So get back on the phone with DELL and tell them , you want upgrade.
Be VERY frim with them.