The Joint Genome Institute Genome Portal contains browseable and blastable genome assemblies for several organisms, including Pufferfish, Frog, and Sea squirt.
The ECR (Evolutionary Conserved Regions) browser is a web-based tool for visualizing and navigating through whole genome alignments of several vertebrate species. Users can also submit sequences for alignment with one of the genomes represented.
Lots of information on fugu including complete draft sequence, annotations, comparative vertebrate genomics, phylogenies, publications, and information about the fugu genome project; has some very useful tools including annotation tools, an Ensembl mirror, and BLAST.
An analysis of a set of unique, highly accurate virtual transcripts that are represented in the worlds public EST data; can perform a BLAST search against the TIGR unique Gene Indices.