[BGL] Using BGL for huge graphs

Hi, has anybody tried using BGL for really huge graphs? I mean graphs that are so big that there's no way to store the whole graph in memory. Any ideas on how it should be implemented? My first thought is that it should be fairly straightforward: simply construct classes that model Sequence or RandomAccessContainer for the VertexList parameter etc. The classes store part of the data in memory and read/write data to disc when necessary. Any pitfalls, gotchas or other stuff I should be aware of before embarking on this? Thanks, /Erik